involute

Etymology
Borrowed from.

Adjective

 * 1)  Difficult to understand; complicated.
 * 2)  Having the edges rolled with the adaxial side outward.
 * 3)  Having a complex pattern of coils in which younger whorls only partly surround older ones.
 * 4)  Turned inward at the margin, like the exterior lip of the shells of species in genus.
 * 5)  Rolled inward spirally.
 * 1)  Turned inward at the margin, like the exterior lip of the shells of species in genus.
 * 2)  Rolled inward spirally.

Verb

 * 1) To roll or curl inwards.

Noun

 * 1)  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.

Translations

 * Finnish: involuutta
 * French:
 * Tagalog: sultag