INVOLUTE

involute|involuted. Involute, or Involuted, a. rolled in, as leaves when their margins are rolled spirally inwards

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{ In″vo‐lute (?), In″vo‐lu′ted (?), } a. [[L. involutus, p. p. of involvere. See Involve.]] 1. 1. (Bot.) Rolled inward from the edges; — said of leaves in vernation, or of the petals of flowers in æstivation. Gray.
2. 2. (Zoöl.) (a) Turned inward at the margin, as the exterior lip of the Cyprea. (b) Rolled inward spirally.