(historical) A cap worn on shipboard. / A basket-shaped sponge, sometimes very large, found in Florida waters.

(slang, transitive) To divide (a drug) into capsules.

(UK, historical) A square of black fabric worn on the head by a judge delivering a death sentence.

Alternative form of thinking cap

A smoking cap.

(virology) Removal of the start of a strand of host cell RNA to serve as the 5' cap of viral mRNA.

(virology) Synonym of cap snatching

A badge appearing on a hat, as part of a uniform

plural of cap badge

Obsolete form of cap-a-pie.