1. A straight line passing through a spherical body between its two poles, and about which the body may revolve.
2. The central line of the body or any of its parts.
3. The vertebral column.
4. The central nervous system.
5. [NA]. The second cervical vertebra. Syn: epistropheus, odontoid vertebra, toothed vertebra, vertebra dentata.
6. An artery that divides, immediately upon its origin, into a number of branches, e.g., celiac axis. See: trunk.
Origin
[L. axle, axis]
basibregmatic axis
basicranial axis
basifacial axis
biauricular axis
axis bulbi externus
axis bulbi internus
celiac axis
cephalocaudal axis
cerebrospinal axis
condylar axis
conjugate axis
craniofacial axis
electrical axis
embryonic axis
encephalomyelonic axis
external axis of eye
facial axis
hinge axis
instantaneous electrical axis
internal axis of eye
axis of lens
axis lentis
long axis
long axis of body
mandibular axis
mean electrical axis
neural axis
neutral axis of straight beam
normal electrical axis
opening axis
optic axis
axis opticus
orbital axis
pelvic axis
axis pelvis
principal optic axis
pupillary axis
rotational axis
sagittal axis
secondary axis
axis of symmetry
thoracic axis
thyroid axis
transporionic axis
transverse horizontal axis
vertical axis
visual axis
Y-axis