Involute

Origin

From Latin involutus.

Adjective

1. (formal) Difficult to understand; complicated.
2. (botany) Having the edges rolled with the adaxial side outward.
• Schuster Hepaticae V|7Furthermore, the free anterior margin of the lobule is arched toward the lobe and is often involute...
3. (biology, of shells) Having a complex pattern of coils.
4. (biology) Turned inward at the margin, like the exterior lip of the Cyprea.
5. (biology) Rolled inward spirally.

Full definition of involute

Verb

1. To roll or curl inwards.

Noun

1. (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.