[in.vo.lute] adj [L involutus concealed, fr. pp. of involvere] (1661) 1 a: curled spirally b (1): curled or curved inward (2): having the edges rolled over the upper surface toward the midrib "an ~ leaf" c: having the form of an involute "a gear with ~ teeth"
2: involved, intricate
[2]involute n (ca. 1796): a curve traced by a point on a thread kept taut as it is unwound from another curve "~ of a circle" [3]in.vo.lute vi -lut.ed ; -lut.ing (1816) 1: to become involute
2. a: to return to a former condition b: to become cleared up: disappear