Ab-do´men. [L. abdo, to hide.] That part of the body which lies between the thorax and the bottom of the pelvis.

Ab-dom´in-is. Pertaining to the abdomen.

A-ce-tab´u-lum. [L. acetum, vinegar.] The socket for the head of the thigh-bone; an ancient vessel for holding vinegar.

A-ce´tic. [L. acetum, vinegar.] Relating to acetic acid. This is always composed of oxygen, hydrogen, and carbon, in the same proportion.

A-chil´lis. A term applied to the tendon of two large muscles of the leg.

A-cro´mi-on. [Gr. ακρος, akros, highest, and ωμος, omos, shoulder.] A process of the scapula that joins to the clavicle.

Ad-duc´tor. [L. adduco, to lead to.] A muscle which draws one part of the body toward another.

Al-bu-gin´e-a. [L. albus, white.] A term applied to white textures.

Al-bu´men. [L. albus, white.] An animal substance of the same nature as the white of an egg.

A-lu´min-um. [L.] The name given to the metallic base of alumina.