ep-

1.
variant of epi- before a vowel or h: epaxial.
British Dictionary definitions for ep-

ep-

prefix
1.
variant of epi- epexegesis

epi-

prefix
1.
on; upon; above; over: epidermis, epicentre
2.
in addition to: epiphenomenon
3.
after: epigenesis, epilogue
4.
near; close to: epicalyx
Word Origin
from Greek, from epi (prep)
ep- in Medicine

ep- pref.
Variant of epi-.