grinder

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun One that grinds, especially.
• noun One who sharpens cutting edges.
• noun A mechanical device that grinds.
• noun A molar.
• noun Informal The teeth.

from The Century Dictionary.

• noun One who or that which grinds.
• noun One of the double teeth used to grind or triturate the food; a molar; hence, a tooth in general. See molar.
• noun One who sharpens or polishes cutting instruments: as, a scissors-grinder.
• noun A grinding-machine; any implement or tool for grinding or polishing: as, an emery grinder.
• noun The dish-washer or restless flycatcher, Seisura inquieta. See Seisura.
• noun The night-jar, Caprimulgus europæus, more fully called knife-, razor-, or scissor-grinder, from the noise it makes. Compare spinner, wheel-bird.
• noun A cylinder covered with emery for sharpening the wire teeth in card-clothing.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, grinds.
• noun One of the double teeth, used to grind or masticate the food; a molar.
• noun (Zoöl.) The restless flycatcher (Seisura inquieta) of Australia; -- called also restless thrush and volatile thrush. It makes a noise like a scissors grinder, to which the name alludes.
• noun local, U.S. A submarine sandwich.
• noun (Med.) a lung disease produced by the mechanical irritation of the particles of steel and stone given off in the operation of grinding.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A molar.
• noun A power tool with a spinning abrasive disc, used for grinding, smoothing, and shaping materials, usually metal.
• noun A sandwich made on a long, cylindrical roll.
• noun A kitchen gadget for processing coffee, herbs etc. into small or powdered pieces

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun grinding tooth with a broad crown; located behind the premolars
• noun machinery that processes materials by grinding or crushing
• noun a machine tool that polishes metal
• noun a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States