- one of the four processes of a vertebra, occurring in pairs that interlock each vertebra with the vertebrae above and below.
Origin of zygapophysis
1850–55; zyg- + apophysis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for zygapophysis
Zygapophysis, zī-ga-pof′i-sis, n. one of the yoke-pieces or articulations of the vertebr: pl.
- anatomy zoology one of several processes on a vertebra that articulates with the corresponding process on an adjacent vertebra
C19: from zygo- + apophysis