Main Entry: ¹cap

Pronunciation: \ˈkap\

Function: noun

Usage: often attrib

1 : a natural cover or top: as a : pileus b : patella, kneecap
2 : something that serves as a cover or protection especially for a tip, knob, or end (as of a tooth)
3 British : cervical cap
4 : a cluster of molecules or chemical groups bound to one end or a region of a cell, virus, or molecule <the cell surface receptors were redistributed into caps>