Definition of preaxial in US English:

preaxial

adjective

Anatomy
  • Located anterior to an axis, especially the main axis of the body or of a body part; specifically designating, relating to, or derived from the upper (cranial) border of a developing limb; radial or tibial. Opposed to postaxial.

Origin

Late 19th century; earliest use found in St. George Mivart (1827–1900), zoologist and Roman Catholic polemicist. From pre- + axial.

Pronunciation

preaxial

/(ˌ)priːˈaksɪəl/