Zyg′a‐poph″y‐sis (?), n.; pl.Zygapophyses (#). [Gr. ζυγόν a yoke + E. apophysis.] (Anat.) One of the articular processes of a vertebra, of which there are usually four, two anterior and two posterior. See under Vertebra. — Zyg′ap‐o‐phys″i‐al (#), a.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.