a prefix occurring in loanwords from Greek, where it meant “upon,” “on,” “over,” “near,” “at,” “before,” “after” (epicedium; epidermis; epigene; epitome); on this model, used in the formation of new compound words (epicardium; epinephrine).
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Origin of epi-
<Greek, prefixal use of epí, preposition and adv.
Words nearby epi-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for epi-
eph- or before a vowel ep-
on; upon; above; overepidermis; epicentre
in addition toepiphenomenon
near; close toepicalyx
Word Origin for epi-
from Greek, from epi (prep)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for epi-
Close to; near:epimer.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.