ephemeron

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e·phem·er·on

 (ĭ-fĕm′ə-rŏn′)
n. pl. e·phem·er·a (-ər-ə) or e·phem·er·ons
1. A short-lived thing.
2. ephemera Printed matter of passing interest.

[Greek ephēmeron, mayfly, from neuter of ephēmeros, daily, short-lived; see ephemeral.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ephemeron

(ɪˈfɛməˌrɒn)
n, pl -era (-ərə) or -erons
(usually plural) something transitory or short-lived
[C16: see ephemeral]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

e•phem•er•on

(ɪˈfɛm əˌrɒn, -ər ən)

n., pl. -er•a (-ər ə)
-er•ons.
anything short-lived or ephemeral.
[1570–80; < Greek ephḗmeron short-lived insect, n. use of neuter of ephḗmeros; see ephemeral]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ephemeron

anything shortlived, or of brief duration, especially certain types of insects such as the mayfly.
See also: Insects
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ephemeron - anything short-lived, as an insect that lives only for a day in its winged form
insect - small air-breathing arthropod
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