INVOLUTE
involute
(adjective) (of some shells) closely coiled so that the axis is obscured
involute, rolled
(adjective) especially of petals or leaves in bud; having margins rolled inward
Source: WordNet® 3.1
Etymology
Adjective
involute (comparative more involute, superlative most involute)
(formal) Difficult to understand; complicated.
(botany) Having the edges rolled with the adaxial side outward.
(biology, of shells) Having a complex pattern of coils in which younger whorls only partly surround older ones.
(biology) Turned inward at the margin, like the exterior lip of the shells of species in genus Cypraea.
(biology) Rolled inward spirally.
Verb
involute (third-person singular simple present involutes, present participle involuting, simple past and past participle involuted)
To roll or curl inwards.
Noun
involute (plural involutes)
(geometry) A curve that cuts all tangents of another curve at right angles; traced by a point on a string that unwinds from a curved object.
Source: Wiktionary
In"vo*lute, In"vo*lu`ted, a. Etym: [L. involutus, p. p. of involvere.
See Involve.]
1. (Bot.)
Definition: Rolled inward from the edges; -- said of leaves in vernation,
or of the petals of flowers in æstivation. Gray.
2. (Zoöl.)
(a) Turned inward at the margin, as the exterior lip of the Cyprea.
(b) Rolled inward spirally.
In"vo*lute, n. (Geom.)
Definition: A curve traced by the end of a string wound upon another curve,
or unwound from it; -- called also evolvent. See Evolute.
Source: Webster’s Unabridged Dictionary 1913 Edition