ephemeron

ephemeron

[ih-fem-uh-ron, -er-uhn] ,
noun, plural ephemera [ih-fem-er-uh] , ephemerons.
1.
anything short-lived or ephemeral.
2.
ephemera, items designed to be useful or important for only a short time, especially pamphlets, notices, tickets, etc.

Origin:
1570–80; < Greek ephḗmeron short-lived insect, noun use of neuter of ephḗmeros; see ephemeral

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ephemeron (ɪˈfɛməˌrɒn)
 
n , pl -era, -erons
(usually plural) something transitory or short-lived
 
[C16: see ephemeral]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

ephemeron
1620s, from Gk. (zoon) ephemeron, neut. of ephemeros (see ephemera).
Online Etymology Dictionary, © 2010 Douglas Harper
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