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A rapid involuntary oscillation of the eyeballs.

A person under arrest, or in custody, whether in prison or not; a person held in involuntary restraint; a captive; as, a prisoner at the bar of a court. Bouvier. Prisoner of Hope thou art, -- look up and sing. Keble. Prisoner's base. See Base, n., 24.

d, whether as the result of generation, growth, labor, or thought, or by the operation of involuntary causes; as, the products of the season, or of the farm; the products of manufactures; the products of the brain. There are the product Of those ill-mated marriages. Milton. These institutions are the products of enthus…

An involuntary movement produced by reflex action. Patellar reflex. See Knee jerk, under Knee.

Of involuntary motion:

of the foot on a floor causes the patient to spring into the air, so as to make repeated involuntary motions of hopping and jumping. J. Ross.

ediately expel it; to make a deep single audible respiration, especially as the result or involuntary expression of fatigue, exhaustion, grief, sorrow, or the like.

To emit air, chiefly through the nose, audibly and violently, by a kind of involuntary convulsive force, occasioned by irritation of the inner membrane of the nose. Not to be sneezed at, not to be despised or contemned; not to be treated lightly. [Colloq.] "He had to do with old women who were not to be sneezed at." Pr…

An involuntary and unnatural contraction of one or more muscles or muscular fibers.

Abnormally frequent involuntary emission of the semen without copulation.

To make involuntary stops in uttering syllables or words; to hesitate or falter in speaking; to speak with stops and diffivulty; to stutter. I would thou couldst stammer, that thou mightest pour this conclead man out of thy mouth, as wine comes out of a narrow-mouthed bottle, either too much at once, or none at all. Sh…

An habitual sudden twitching of the hinder leg of a horse, or an involuntary or convulsive contraction of the muscles that raise the hock. [Written also springhalt.]

An involuntary shaking or quivering. I am all of a tremble when I think of it. W. Black.

An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear; quaking; quivering.

Involuntary. [Obs.] Fuller.

untary motions of an animal, such as the movements of the leg or arm (in distinction from involuntary motions, such as the movements of the heart); the voluntary muscle fibers, which are the agents in voluntary motion.

A woman held in involuntary confinement for purposes of prostitution; loosely, any woman forced into unwilling prostitution.

An involuntary act, excited by drowsiness, etc., consisting of a deep and long inspiration following several successive attempts at inspiration, the mouth, fauces, etc., being wide open. One person yawning in company will produce a spontaneous yawn in all present. N. Chipman.