/ Dictionary / Index Z zygapophysis: Meaning and Definition of Find definitions for: zyg•a•poph•y•sis Pronunciation: (zig"u-pof'u-sis, zī"gu-), [key] — pl. -ses 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. zydeco zygo- Related Content Daily Word Quiz: cosmology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language