involute

adjective

1. especially of petals or leaves in bud; having margins rolled inward

Similar word(s): coiled, rolled

2. (of some shells) closely coiled so that the axis is obscured

Similar word(s): coiled

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.

verb

1. To roll or curl inwards.