kerat-

1.
variant of kerato- before a vowel:
keratitis.
British Dictionary definitions for kerat-

kerato-

combining form
1.
indicating horn or a horny substance: keratin, keratogenous
2.
indicating the cornea: keratoplasty
Word Origin
from Greek kerat-, keras horn
kerat- in Medicine

kerat- pref.
Variant of kerato-.