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

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

noun. 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.

noun. A plant of the genus Trifolium; clover.

noun. The third leaf put forth by a young plant.

noun. 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.

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

noun. 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.

noun. 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.

noun. An ornamental foliation consisting of three divisions, or foils.

noun. A charge representing the clover leaf.

noun. Any of several plants of the pea family, having compound, trifoliate leaves; especially one of the genus Trifolium.

noun. A symbol having the shape of such leaves, especially when used as an architectural ornament.

noun. any of several Old World herbs of the genus Medicago having small flowers and trifoliate compound leaves

noun. a plant of the genus Trifolium

noun. an architectural ornament in the form of three arcs arranged in a circle

"It is sometimes designated by the term trefoil, three leaved."

bird's-foot trefoil  bitumen-trefoil  bog-trefoil  hare's-foot trefoil  marsh-trefoil  

architectural ornament  

alfalfa  cinquefoil  clover  heartshaped  huitfoil  

clover  deuce-ace  leash  set of three  shamrock  

clover  medic