2. Not under the influence or control of the will; not voluntary; as,
the involuntary movements of the body; involuntary muscle fibers.
3. Not proceeding from choice; done unwillingly; reluctant; compulsory;
as, involuntary submission.
{ In"vo*lute (?), In"vo*lu`ted (?), } a. [L. involutus, p. p. of
involvere. See Involve.] 1. (Bot.) Rolled inward from the edges; --
said of leaves in vernation, or of the petals of flowers in æstivation.
Gray.
2. (Zoöl.) (a) Turned inward at the margin, as the exterior lip of the
Cyprea. (b) Rolled inward spirally.
In"vo*lute, n. (Geom.) A curve traced by the end of a string wound upon
another curve, or unwound from it; -- called also evolvent. See
Evolute.