[syn: clover, trefoil]
3. an architectural ornament in the form of three arcs arranged in a circle;
The Collaborative International Dictionary of English v.0.48:
Trefoil \Tre"foil\, n. [L. tres three + E. foil leaf; cf. F.
fr[`e]fle, It. trifoglio, L. trifolium. See Tri-, Foil
leaf, and cf. Trifoly.]
1. (Bot.) 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.
2. (Arch.) An ornamental foliation consisting of three
divisions, or foils.
3. (Her.) A charge representing the clover leaf.
WordNet (r) 3.0 (2006):
n 1: any of several Old World herbs of the genus Medicago having
small flowers and trifoliate compound leaves [syn: medic,
2: a plant of the genus Trifolium [syn: clover, trefoil]
3: an architectural ornament in the form of three arcs arranged
in a circle
Moby Thesaurus II by Grady Ward, 1.0:
41 Moby Thesaurus words for "trefoil":
clover, deuce-ace, leash, set of three, shamrock, tercet, ternary,
ternion, terzetto, three, threesome, tierce, trey, triad,
trialogue, triangle, tricorn, trident, triennium, trihedron,
trilogy, trimester, trine, trinity, trinomial, trio, triphthong,
triple crown, triple threat, triplet, triplopy, tripod, triptych,
trireme, triseme, triskelion, trisul, triumvirate, triunity,