involute
noun
Definitions
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.
verb
Definitions
To roll or curl inwards.
adjective
Definitions
Difficult to understand; complicated.
Having the edges rolled with the adaxial side outward.
(of shells) Having a complex pattern of coils in which younger whorls only partly surround older ones.
Turned inward at the margin, like the exterior lip of the shells of species in genus Cypraea.