Anatomy and Zoology. Annular; spec. designating any of various muscles surrounding, and having the function of constricting, an opening of the body…

Having two heads or summits; spec. applied to muscles (see B.).

Having two heads; = biceps, adj.

having three bellies, as a muscle.

Anatomy. Designating an adductor muscle; of or relating to adduction. Contrasted with abducent, adj. 1 Now rare.

Having two bellies; digastric.

Raising, lifting up; spec. applied to muscles whose function is to raise various parts of the body. (The Latin attollens is chiefly used.)

Resembling a feather; spec. (of a muscle) having fibres attached to a tendon like the barbs of a feather to the rachis (= pennate, adj. 3).

Physiology. Of a muscle: that acts as an antagonist (antagonist, n. 3). Also: designating the action of such muscles.

Anatomy. Of a muscle: having a single ‘belly’ or fleshy part; (originally) spec. †designating the tensor tympani (obsolete). Cf. digastric, adj. rare.

Of, relating to, or causing adduction of a part of the body (see adduction, n.1 2). Cf. adducent, adj. 1, adductor, n.

Anatomy. Of a muscle: superficial, esp. with regard to another muscle; spec. designating the flexor digitorum superficialis muscle, which arises…

Biology. Having branches or parts arranged like the barbs of a feather; pinnate; penniform, pennate. Now rare.

Anatomy. Applied to a muscle of a member or organ which has its origin and insertion within that organ; so in Pathology to a morbid growth arising…

Anatomy and Biology. Of a muscle: having fibres attached to a tendon like the barbs of a feather to the rachis. Cf. earlier penniform, adj., pennated…

of or pertaining to, of the nature of, a sphincter.

Physiology. Designating a muscle that is an agonist (agonist, n. 4); of or relating to such a muscle. Cf. earlier antagonistic, adj. 2.

possessing a sphincter (of a specified kind).