Avicul´ture, n. Care of birds.
A´vis, n.; pl. aves. Bird.
Axil´la, n. Armpit; hollow beneath the shoulder. (78.)
Ax´illar or Ax´illary, a. Pertaining to the armpit.
Ax´illaries, n. pl. Lengthened or otherwise distinguished feathers growing from the axillary region. (81.)
Ax´is, n. Second cervical vertebra. Also, an imaginary line passing along the middle of any one of the three mutually perpendicular planes of the body, the longitudinal, vertical, and transverse. Also, a pivot.
A´zygos, a. Single, in the sense of not paired.
B.
Back, n. Upper surface of body proper, corresponding to dorsal and sacral vertebræ. Includes Interscapilium and Tergum (which see). (57.)
Back of Neck. Cervical region. Includes Nucha and Cervix (which see). Equivalent to hind-neck. (48.)