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_.