trefoiled

adj

1. (not-comparable)Having the shape of a trefoil.

   “The knop is formed of three rams' heads, and the base, trefoiled-shaped, has three bosses […]”

2. (not-comparable)Having the shape of a trefoil.

   “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.”

3. (especially, not-comparable)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;[…]”