{ } a. [ L. involutus, p. p. of involvere. See Involve. ] 1. (Bot.) Rolled inward from the edges; -- said of leaves in vernation, or of the petals of flowers in æstivation. Gray. [ 1913 Webster ]

2. (Zool.) (a) Turned inward at the margin, as the exterior lip of the Cyprea. (b) Rolled inward spirally. [ 1913 Webster ]