nounWord forms: plural eˈphemera (ɪˈfɛmərə
; ifemˈərə) or eˈphemerˌons
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'ephemeron'Gr ephēmeron, short-lived insect < ephēmeros, for the day, short-lived < epi-, upon + hēmera, day