Zygapophysis \Zyg`a*poph"y*sis\, n.; pl. {Zygapophyses}. [Gr. ?
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.
[1913 Webster]