As-trag´a-lus. [Gr.] The name of a bone of the foot. One of the tarsal bones.

Aud-i´tion. [L. audio, to hear.] Hearing.

Aud-it-o´ri-us. [L.] Pertaining to the organ of hearing.

Au´ri-cle. [L. auricula, the external ear; from auris, the ear.] A cavity of the heart.

Au-ric´u-lar. [L. auricula.] Pertaining to the auricle.

Ax-il´la. [L.] The armpit.

Ax´il-la-ry. Belonging or relating to the armpit.

A-zote´. [Gr. α, a, not, and ζωη, zoē, life.] Nitrogen. One of the constituent elements of the atmosphere. So named because it will not sustain life.

Ben-zo´ic. Benzoic acid. A peculiar vegetable acid, obtained from benzoin and some other balsams.

Bi´ceps. [L. bis, twice, and caput, a head.] A name applied to muscles with two heads at one extremity.