Definition of postzygapophysial in US English:

postzygapophysial

(also postzygapophyseal)

adjective

Anatomy Zoology
  • Relating to or of the nature of a postzygapophysis.

Origin

Mid 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From postzygapophysis + -al, after apophysial.