Al´ve-o-lar. [L. alveolus, a socket] Pertaining to the sockets of the teeth.

Am-mo´ni-a. An alkali. It is composed of three equivalents of hydrogen and one of nitrogen.

A-nas´to-mose. [Gr. ανα, ana, through, and στομα, stoma, mouth.] The communication of arteries and veins with each other.

An-a-tom´i-cal. Relating to the parts of the body, when dissected or separated.

A-nat´o-my. [Greek ανα, ana, through, and τομη, tomē a cutting.] The description of the structure of animals. The word anatomy properly signifies dissection.

An´gu-li. [L. angulus, a corner.] A term applied to certain muscles on account of their form.

An-i-mal´cu-læ. [L. animalcula, a little animal.] Animals that are only perceptible by means of a microscope.

An´nu-lar. [L. annulus, a ring.] Having the form of a ring.

An-ti´cus. [L.] A term applied to certain muscles.

A-ort´a. [Gr. αορτη, aortē; from αηρ, aēr, air, and τηρεω, tēreo, to keep.] The great artery that arises from the left ventricle of the heart.