Sawdust & Ponytails · Reference
The Complete Glossary of Woodworking Terms
Written for normal humans. No assumed knowledge. No condescension. Just the words, what they mean, and when they matter.
Every craft has a language. Woodworking's is particularly dense — and tutorials love to assume you already speak it. This glossary covers everything from board foot math to what the heck “proud” means when someone says a plug is sitting proud. Start wherever you are. Come back whenever you need it.
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Wood & lumber
Board foot
The standard unit for buying lumber. One board foot = a piece 1” thick × 12” wide × 12” long. The math: (thickness × width × length in inches) ÷ 144. Yes, it’s annoying. You’ll get used to it.
Dimensional lumber
Lumber sold by a standardized name that has nothing to do with actual size. A “2×4” actually measures 1.5” × 3.5”. The lumber industry’s longest-running prank.
Rough lumber
Wood straight from the mill. Unplaned, unsanded, slightly fuzzy. Usually cheaper. You do the finishing work.
S4S
Surfaced Four Sides
Lumber that’s been planed smooth on all four sides and is ready to use. What most home improvement stores sell.
Hardwood
Wood from deciduous (leaf-shedding) trees: oak, maple, walnut, cherry. Usually denser and more durable. Not always literally harder — balsa is technically a hardwood.
Softwood
Wood from coniferous (evergreen) trees: pine, fir, cedar, spruce. Generally cheaper and easier to find. Great for building; can dent more easily in furniture.
Grain
The direction and pattern of wood fibers. Working with the grain = smooth. Working against it = rough, tearout, and feelings of betrayal.
End grain
The surface you see when you cut across the wood fibers. Looks like a cross-section of a tree. Absorbs stain and finish faster than face grain — plan for that.
Face grain
The flat, wide surface of a board. What you usually see on the front of furniture.
Edge grain
The narrow side of a board, showing the growth rings running lengthwise.
Figure
The decorative pattern in wood created by grain, growth, or how the log was cut. Curly, quilted, burl, bird’s eye — all types of figure. Beautiful and usually more expensive.
Heartwood
The dense, darker wood at the center of a tree. More stable and rot-resistant than sapwood. The good stuff.
Sapwood
The lighter-colored wood between heartwood and bark. Still usable, but less stable and more prone to insect damage.
Burl
A knotty, rounded growth on a tree where the grain has gone completely rogue. Sliced into slabs, it’s gorgeous. Chaotic, but gorgeous.
Knot
Where a branch was attached to the trunk. Tight knots are stable and can be decorative. Loose knots fall out eventually — a liability in structural or furniture work.
Green wood
Freshly cut, unseasoned wood with high moisture content. Works beautifully with hand tools but will move, warp, or crack as it dries. Approach with respect.
Seasoned wood
Wood that’s been dried to a stable moisture content. Air-dried or kiln-dried. Stable and ready to work.
Kiln-dried
KD
Wood dried in a controlled oven. Faster than air drying, more consistent. What most lumber yards sell.
Moisture content
MC
The percentage of water weight in wood. Freshly cut wood can be 50%+. Furniture-grade wood should be 6–8%. Matters enormously for stability.
Acclimation
Letting new lumber sit in your shop before using it, so it adjusts to the environment’s humidity. Skip this, and your finished piece will do the adjusting for you. After you’ve built it.
Warp
Any deviation from flat. Comes in flavors: bow (end-to-end curve), cup (across the width), twist (diagonal), and crook (side-to-side). All annoying.
Checking
Cracks along the grain caused by uneven drying. Common on end grain and log slabs.
Veneer
An extremely thin slice of wood (often 1/42”) glued to a substrate like plywood or MDF. Used to get the look of expensive wood without the full cost, or to create decorative patterns.
Plywood
Thin layers of wood veneer glued together with alternating grain directions. Incredibly strong and stable. The backbone of most cabinet and box work.
MDF
Medium-Density Fiberboard
Wood fibers compressed with resin into sheets. Very flat, very smooth, paints beautifully. Heavy. Does not love moisture. Do not drop it on your foot.
Joinery
The big picture: Every joint exists on a spectrum from fast-and-functional to slow-and-beautiful. Neither end is wrong. Match the joint to the project, the tools you have, and the time you want to spend.
Mortise and tenon
One of woodworking’s oldest and strongest joints. A rectangular slot (mortise) cut in one piece, a matching projection (tenon) on the other. Used in chairs, tables, doors — anything that needs to hold together for decades.
Dovetail
Interlocking wedge-shaped cuts that create a joint nearly impossible to pull apart. Used in drawers and box corners. A beautiful joint. A test of skill. A source of pride and also swearing.
Box joint
Finger joint
Interlocking rectangular tabs. Easier than dovetail, still strong, looks great. The beginner-friendly version of fancy joinery.
Dado
A slot cut across the grain of a board. Shelves sit in dados. Called a “housing joint” in the UK.
Groove
A slot cut with the grain — same as a dado but running lengthwise. Drawer bottoms usually float in grooves.
Rabbet
Rebate (UK)
An L-shaped channel cut along the edge of a board. Used for cabinet backs, drawer slides, and picture frames.
Pocket hole joint
A screw driven at an angle through a pre-drilled angled hole. Fast, strong, not traditionally fancy. Kreg made it accessible and DIYers everywhere rejoiced.
Biscuit joint
A flat oval of compressed wood (the biscuit) glued into matching slots to align and strengthen a joint. Fast and effective for edge-gluing panels.
Dowel joint
Cylindrical wooden pegs glued into matching holes. Strong, clean, no hardware visible.
Lap joint
Two pieces of wood, each notched halfway, that overlap flush. Simple and surprisingly solid.
Miter joint
Two pieces cut at complementary angles (usually 45°) to meet cleanly at a corner. Looks great but doesn’t hold well without reinforcement.
Butt joint
The most basic: two pieces of wood simply butted together and fastened. Not strong on its own, but reinforced with dowels, screws, or pocket holes, it works fine.
Blind joint
Any joint where the joinery is hidden and not visible from the outside. Clean finish, more work to execute.
Spline
A thin strip of wood (or other material) inserted into matching grooves in two pieces to align or strengthen them.
Tools
On buying tools
Buy what you need for the project you’re working on. Not the project you might work on someday. You’ll end up with a shop full of useful tools instead of a shop full of regrets.
Table saw
The central power tool in most shops. A circular blade mounted in a table, used for ripping boards to width and crosscutting. Incredibly capable. Demands respect.
Miter saw
Chop saw
A saw that swings down to make precise crosscuts and angled cuts. Your best friend for anything that needs to be cut square or to a consistent length.
Circular saw
A handheld saw with a spinning blade. Incredibly versatile. The tool many women start with, and for good reason.
Jigsaw
A handheld saw with a narrow reciprocating blade for cutting curves. The tool that makes organic shapes possible.
Bandsaw
A continuous loop blade on two wheels. Great for resawing thick lumber, cutting curves, and slicing veneers.
Router
A spinning bit that cuts profiles, grooves, dadoes, and decorative edges. Handheld or mounted in a table. One of the most versatile tools you’ll own.
Planer
Thickness planer
A machine that shaves wood to a consistent thickness. Takes rough lumber and makes it flat and even.
Jointer
A machine that creates one perfectly flat, square face or edge. Usually step one before the planer. Joint then plane — that’s the sequence.
Drill press
A drill mounted on a column that moves straight up and down. Guarantees perfectly perpendicular holes. Worth having.
Random orbital sander
The workhorse of finishing. Moves in tiny random circles to avoid leaving swirl marks. Every woodworker owns one.
Hand plane
A bladed tool pushed along wood to shave thin layers and create flat, smooth surfaces. Satisfying to use. A rabbit hole of hobby and obsession.
Chisel
A steel blade with a handle, used for paring joints, cleaning corners, and carving. Among the oldest woodworking tools in existence. Keep it sharp.
Mallet
A wooden or rubber hammer used to strike chisels. Not a regular hammer — you’ll split the handle.
Marking gauge
A tool that scribes a line parallel to an edge at a set distance. Used to mark joints, tenons, and rebates with precision.
Combination square
A ruler with an adjustable head for marking 90° and 45° angles, checking flatness, and measuring depth. One of the most useful tools in the shop.
Clamps
The devices that hold glue-ups together while they dry. You always need more than you think. Always.
Pocket hole jig
A jig (typically Kreg) that guides a drill bit at the correct angle for pocket hole joinery. Responsible for a significant percentage of beginner furniture worldwide.
Forstner bit
A flat-bottomed drill bit that cuts clean, flat-bottomed holes. Used for hardware, hinges, and any place you need a precise cylindrical pocket.
Cuts
Rip cut
A cut that runs parallel to the grain, down the length of the board. Done on the table saw.
Crosscut
A cut perpendicular to the grain, across the width. Done with a miter saw, circular saw, or hand saw.
Miter cut
An angled cut across the face of a board. Used for frames and corners.
Bevel cut
An angled cut through the thickness of a board. The blade tilts.
Compound miter
Both a miter and a bevel at the same time. Crown molding territory. Do not attempt without coffee.
Kerf
The width of material removed by a saw blade. Usually around 1/8”. Matters when precision is required — every kerf is wood that’s gone.
Resaw
Cutting a board through its thickness to make two thinner boards. Done on the bandsaw.
Rabbet cut
An L-shaped cut along the edge of a board using a router or table saw. Creates a ledge for another piece to sit in.
Finishing
Rule of finishing: Test everything on scrap first. The piece you spent 12 hours building is not the place to discover what happens when you apply that stain to this wood.
Sanding
Progressively smoothing a surface using increasingly fine abrasives. Start rough (80 grit), finish fine (220 grit). Do not skip grits. Do not.
Grit
The size of abrasive particles on sandpaper. Lower number = coarser = removes material faster. Higher number = finer = smoother finish.
Tearout
When wood fibers rip instead of cutting cleanly, leaving a rough, shredded surface. Caused by cutting against the grain or using a dull blade.
Raising the grain
What happens when you apply water-based finish and the wood fibers swell and feel fuzzy. Sand lightly between coats with fine sandpaper to knock it back down.
Stain
A colorant that soaks into wood to change its color. Pigment-based or dye-based. Test on scrap first. Always.
Sealer
A first coat that closes the grain before finish coats. Prevents blotchiness, especially on soft or porous woods like pine and cherry.
Topcoat
The final protective layer: polyurethane, lacquer, oil, wax, or other finish. Protects the wood and determines the sheen level.
Polyurethane
A plastic-based finish in oil or water-based formulas. Durable, water-resistant, common. Oil-based yellows slightly over time; water-based stays clear.
Danish oil
A penetrating oil finish that soaks into the wood rather than sitting on top. Easy to apply. Needs reapplication over time. Beloved for its natural look.
Shellac
A resin dissolved in alcohol. Dries fast, repairs easily, and is compatible with nearly everything else. Often used as a sealer coat.
Milk paint
A traditional, water-based paint made from casein. Matte, chalky, beautiful on furniture. Authentic and a bit unpredictable — which is part of the charm.
Wax
A final protective layer applied over other finishes or directly on wood. Easy to apply and buff. Not waterproof. Rewax annually.
Shop concepts
Face side / face edge
Your reference surfaces. You joint one face flat, one edge square, and measure everything else from those two surfaces. The foundation of accuracy in every project.
Square
When two surfaces are at a perfect 90° to each other. Checking for square is the first thing you do, and the thing you forgot to do when something doesn’t fit.
Plumb
Perfectly vertical. Level is horizontal. These two words are not interchangeable, and this will matter when you build something tall.
Flat
No twist, bow, cup, or warp. The goal. Always the goal.
Tolerance
How much variation is acceptable. Furniture: tight. Rough framing: loose. Know your tolerance before you start cutting.
With the grain
Working in the direction the grain rises toward you — like petting a cat in the direction its fur lies. Smooth cuts result.
Against the grain
Working in the opposite direction. Rough cuts result. Like petting the cat backward. The cat hates it.
Snipe
The slight gouge a planer makes at the very beginning and end of a board. Classic beginner surprise. Leave extra length and trim it off.
Dry fit
Assembling a project without glue to make sure everything fits before the permanent step. Do this. Always do this.
Glue-up
The process of gluing multiple pieces together, clamping, and letting them cure. Stressful, time-sensitive, extremely satisfying when it goes well.
Curing
The process of glue or finish hardening chemically, not just drying. Fully cured wood glue is often stronger than the wood itself.
Kerf allowance
Accounting for the material the saw blade removes when planning cuts. If your blade removes 1/8” and you ignore that across 6 cuts, you’ll be 3/4” short. The math matters.
Safety
Non-negotiable
Safety glasses, hearing protection, dust mask. Every time. No exceptions. Your eyes, ears, and lungs are not replaceable parts.
Push stick
A device that keeps your hands away from the blade while guiding wood through a saw. Use it. Every time. Not just when it feels necessary.
Featherboard
A device with flexible fingers that holds wood against the fence and table while cutting. Prevents kickback and keeps cuts consistent.
Kickback
When a saw blade catches wood and throws it back at high speed. The most common serious power tool injury. Caused by binding, improper technique, or skipping safety devices.
PPE
Personal Protective Equipment
Safety glasses, hearing protection, and a dust mask or respirator. The minimum required every time you step into the shop.
Dust collection
A system that captures sawdust at the source. Important for clean air and fire prevention. Fine wood dust is a respiratory hazard. Your lungs are not replaceable.
Outfeed support
Support behind a tool to hold long boards as they exit. Without it, gravity does the work instead of you, often at the worst moment.
Jargon you’ll hear
On jargon: Every craft community develops shorthand. Woodworking is no different. These are the phrases you’ll encounter in tutorials, forums, and the shop that nobody ever stops to explain.
“True it up”
Make it flat, square, or aligned. When something is slightly off, you true it up — plane an edge, adjust a fence, square a corner.
“Sneak up on it”
Make small, incremental cuts or adjustments rather than taking too much off at once. You can always remove more. You cannot add wood back.
“Measure twice, cut once”
The single most repeated piece of advice in woodworking. Annoyingly, it’s correct.
“Proud”
Sticking up slightly above the surrounding surface. “The plug is sitting proud” means it’s a tiny bit too high. Sand or plane it flush.
“Flush”
Perfectly even with the surrounding surface. The goal after proud.
“In the rough”
Unfinished, unmachined lumber. Also a description of your shop at the end of a long project day.
Story stick
A piece of wood marked with all the critical measurements for a project, used instead of a tape measure. Transfers measurements without math errors. Genuinely brilliant.
Winding sticks
Two parallel sticks placed at each end of a board to visually reveal twist. Old technique. Still works perfectly.
Gang cut
Cutting multiple pieces at once, stacked together. Saves time and ensures identical dimensions.
Chattering
When a blade or bit vibrates rather than cutting cleanly, leaving a rough or ridged surface. Fix by taking lighter cuts, checking sharpness, or slowing feed speed.
Marriage piece
Two pieces of wood cut from the same board, joined back together. Grain matches perfectly. Looks completely intentional. Might have been luck.
Cut list
Cutting list
A complete list of every piece needed for a project with its dimensions. Build this before you pick up a saw. Your future self will thank you.
Still have a term you’re not seeing here? That means it belongs in the next edition. Woodworking has been building its vocabulary for thousands of years — we’re not done yet.
Sawdust & Ponytails — calm, capable, and absolutely in control.
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