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

[ Syn: bomber , hero , hero sandwich , hoagie , hoagy , cuban sandwich , italian sandwich , poor boy , sub , submarine , submarine sandwich , torpedo , wedge , zep ]

grinding tooth with a broad crown; located behind the premolars

[ Syn: molar ]

machinery that processes materials by grinding or crushing

[ Syn: mill , milling machinery ]

a machine tool that polishes metal