zygo-

1.
a combining form meaning “yoke,” “yoked,” “yoke-shaped,” used in the formation of compound words:
zygomorphic.
Also, especially before a vowel, zyg-.
Origin
combining form of Greek zygón yoke
British Dictionary definitions for zygo-

zygo-

combining form
1.
indicating a pair or a union: zygodactyl, zygospore
Word Origin
from Greek zugon yoke
zygo- in Medicine

zygo- or zyg-
pref.

  1. Yoke; pair: zygodactyly.

  2. Union: zygosis.