| trefoils | |
| trefoil |
| trefoil | (n) an architectural ornament in the form of three arcs arranged in a circle |
| trefoil arch | (n) a pointed arch having cusps in the intrados on either side of the apex |
| Trefoil | n. [ L. tres three + E. foil leaf; cf. F. frèfle, It. trifoglio, L. trifolium. See Tri-, Foil leaf, and cf. Trifoly. ] |
| Trefoiled | a. (Her.) Same as Tréflé. [ 1913 Webster ] |