Rē'tro-flĕx or Rĕ'tro-flĕx or Rē'tro-flĕxed or Rĕ'tro-flĕxed, a.

a. [Lat. retroflexus, p. p. of retroflectere, to bend back, from re, again, back, and flectere, flexum, to bend, to turn; Fr. rétrofléchi.] (Bot.) Suddenly bent backward. Lindley.