Definition of plicature in US English:

plicature

noun

  • 1A fold, a ridge; specifically = "plica". In early use also: †a plexus (obsolete rare). Also figurative. Now chiefly Botany.

  • 2Surgery= "plication".

Origin

Late Middle English (in an earlier sense). From Middle French plicature a place in the body where there is a bend and its etymon classical Latin plicātūra action of folding, a fold (Pliny), in post-classical Latin also a place in the body where there is a bend from plicāt-, past participial stem of plicāre to fold + -ūra.