trefoiled

Adjective

trefoiled (not comparable)

1. Having the shape of a trefoil.
   • The knop is formed of three rams' heads, and the base, trefoiled-shaped, has three bosses […]1884, The Jewelers' Circular and Horological Review, page 101
   1. Having a three-lobed extremity or extremities; of a cross: having ends which terminate in trefoils (similar or identical to bottony).
      • If the shield is regarded as one showing dimidiated arms, then it may be read as (dexter) gules, a cross trefoiled and voided or, . .. (sinister) gules (2), on two pallets argent, ladders (2) semé (?) azure.1993, Adolph S. Cavallo, Medieval Tapestries in the Metropolitan Museum of Art, Metropolitan Museum of Art, →ISBN, page 141
2. (especially) Ornamented with trefoils projecting from the edges, as a bearing, partition, etc.
   • There is a plain trefoiled window above in the tower; the lower part of the spire having two lancet windows, with a circle […] The pulpit is of modern oak, of five panels, each panel being divided into two trefoiled arched partitions;[…]2014 March 28, James Conway Walter, A History of Horncastle (Illustrated), Lulu Press, Inc, →ISBN