trefoil

Any of various plants of the pea family, chiefly of the genera Trifolium and Lotus, having compound trifoliolate leaves.

An ornament, symbol, or architectural form having the appearance of a trifoliolate leaf.

In anatomy, the triangular area which forms the front part of a molar tooth; the protocone, paracone, and metacone lying at the angles. Same as trigon, 6.

A plant of the genus Trifolium; clover.

The third leaf put forth by a young plant.

An ornamental feathering or foliation used in medieval Pointed architecture in the heads of window-lights, tracery, panelings, etc., in which the spaces between the cusps represent a three-lobed figure.

In heraldry, a bearing supposed to represent a clover-leaf.

A bombycid moth, Lasiocampa trifolii, whose larva feeds on grass and clover in Europe. Also called grass-egger and clover-egger.

Characterized by the presence or prominence of a trefoil or trefoils; consisting of trefoils; thrice foliated.

Any plant of the genus Trifolium, which includes the white clover, red clover, etc.; — less properly, applied also to the nonesuch, or black medic. See clover, and medic.