Dictionary

Any of various edible European bivalve mollusks, of the family Cardiidae, having heart-shaped shells.

The shell of such a mollusk.

(in the plural) One’s innermost feelings (only in the expression “the cockles of one’s heart”).

(directly from French coquille) A wrinkle, pucker

To cause to contract into wrinkles or ridges, as some kinds of cloth after a wetting; to pucker.

Any of several field weeds, such as the common corncockle (Agrostemma githago) and darnel ryegrass (Lolium temulentum).

A £10 note; a tenner.