grinder

nouns

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

Cuban sandwich, Italian sandwich, bomber, grinder, hero, hero sandwich, hoagie, hoagy, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep

grinding tooth with a broad crown; located behind the premolars

grinder, molar

is derived from

grind

machinery that processes materials by grinding or crushing

grinder, mill, milling machinery

is derived from

grind

a machine tool that polishes metal

grinder

is a type of (narrower)

a powered machine for cutting or shaping or finishing metals or other materials

machine tool