ephemeron

[ ih-fem-uh-ron, -er-uh n ]
/ ɪˈfɛm əˌrɒn, -ər ən /

noun, plural e·phem·er·a [ih-fem-er-uh] /ɪˈfɛm ər ə/, e·phem·er·ons.

anything short-lived or ephemeral.
ephemera, items designed to be useful or important for only a short time, especially pamphlets, notices, tickets, etc.

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decorum

Origin of ephemeron

1570–80; < Greek ephḗmeron short-lived insect, noun use of neuter of ephḗmeros; see ephemeral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for ephemeron

British Dictionary definitions for ephemeron

ephemeron
/ (ɪˈfɛməˌrɒn) /

noun plural -era (-ərə) or -erons

(usually plural) something transitory or short-lived

Word Origin for ephemeron

C16: see ephemeral
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