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Drooping of the upper eyelid, produced by paralysis of its levator muscle.

The great extensor muscle of the knee, divided above into four parts which unite in a single tendon at the knee.

A straight muscle; as, the recti of the eye.

center, from which it is reflected to an efferent nerve, and so calls into action certain muscles, organs, or cells. -- Reflex nerve (Physiol.), an excito-motory nerve. See Exito- motory.

of the epithelial cells of the body, or the regeneration of the contractile substance of muscle.

e, or the like; to slacken; to loosen; to open; as, to relax a rope or cord; to relax the muscles or sinews. Horror . . . all his joints relaxed. Milton. Nor served it to relax their serried files. Milton.

The act or process of relaxing, or the state of being relaxed; as, relaxation of the muscles; relaxation of a law.

Resisting pressure or the effect of it; acting against impluse by elastic force. "[Muscles] soft and yet renitent." Ray.

A muscle which serves to retain an organ or part in place, esp. when retracted. See Illust. of Phylactolemata.

One of the retractor muscles of the proboscis of certain worms.

To draw back; to draw up or shorten; as, the cat can retract its claws; to retract a muscle.

The act of retracting or shortening; as, the retraction of a severed muscle; the retraction of a sinew.

A muscle serving to draw in any organ or part. See Illust. under Phylactolæmata.

terized by painful, often multiple, local inflammations, usually affecting the joints and muscles, but also extending sometimes to the deeper organs, as the heart. Inflammatory rheumatism (Med.), acute rheumatism attended with fever, and attacking usually the larger joints, which become swollen, hot, and very painful.…

A robber. [Obs. or Prov. Eng.] Drummond. Rider's bone (Med.), a bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding.

Etym: [L., rigor of heat] (Physiol.), a form of rigor mortis induced by heat, as when the muscle of a mammal is heated to about 50ºC. -- Rigor mortis ( Etym: [L. , rigor of death] , death stiffening; the rigidity of the muscles that occurs at death and lasts till decomposition sets in. It is due to the formation of my…

Used in, or expressing, laughter; as, risible muscles.

Pertaining to, or producing, laughter; as, the risorial muscles.

that which gives a rotary or rolling motion, as a muscle which partially rotates or turns some part on its axis.

Resembling flesh, or muscle; composed of sarcode.