Meaning of zygapophysis

zyg•a•poph•y•sis

Pronunciation: (zig"u-pof'u-sis, zī"gu-), [key]
— pl. -ses
  1. one of the four processes of a vertebra, occurring in pairs that interlock each vertebra with the vertebrae above and below.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.