— zygapophyseal, zygapophysial /zig'ap euh fiz"ee euhl, zuy'gap-/ , adj.
/zig'euh pof"euh sis, zuy'geuh-/ , n. , pl. zygapophyses /-seez'/ . Anat.
one of the four processes of a vertebra, occurring in pairs that interlock each vertebra with the vertebrae above and below.
[ 1850-55; ZYG- + APOPHYSIS ]