I. ˈin-və-ˌlüt adjective
Etymology: Latin involutus concealed, from past participle of involvere
Date: 1661
1.
a. : curled spirally
b.
(1) : curled or curved inward
(2) : having the edges rolled over the upper surface toward the midrib
an involute leaf
c. : having the form of an involute
a gear with involute teeth
2. : involved , intricate
II. noun
Date: circa 1796
: a curve traced by a point on a thread kept taut as it is unwound from another curve
involute of a circle
[
involute a, p, p, p, p traced by any point p of the thread t unwinding from curve c
]
III. ˌin-və-ˈlüt intransitive verb
( -lut·ed ; -lut·ing )
Date: 1816
1. : to become involute
2.
a. : to return to a former condition
b. : to become cleared up : disappear