Word Study
epi-
CIDE DICTIONARY
epi-, [Gr. 'epi` on, upon, to; akin to Skr. api besides, and prob. to L. ob to, before, on account of, and perh. to E. of, off.].
A prefix, meaning upon, beside, among, on the outside, above, over. It becomes ep-before a vowel, as in epoch, and eph-before a Greek aspirate, as in ephemeral. [1913 Webster]
OXFORD DICTIONARY
epi-, prefix (usu. ep- before a vowel or h)
1 upon (epicycle).
2 above (epicotyl).
3 in addition (epiphenomenon).
1 upon (epicycle).
2 above (epicotyl).
3 in addition (epiphenomenon).
Etymology
Gk epi (prep.)
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