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ephemera

[ih-fem-er-uh] /ɪˈfɛm ər ə/
noun, plural ephemeras, ephemerae
[ih-fem-uh-ree] /ɪˈfɛm əˌri/ (Show IPA),
for 2.
1.
a plural of ephemeron.
2.
an ephemerid.
Origin
1670-1680
1670-80; < Greek ephḗmera, neuter plural of ephḗmeros, taken as singular; see ephemeral
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ephemerae

ephemera

/ɪˈfɛmərə/
noun (pl) -eras, -erae (-əˌriː)
1.
a mayfly, esp one of the genus Ephemera
2.
something transitory or short-lived
3.
(functioning as pl) a class of collectable items not originally intended to last for more than a short time, such as tickets, posters, postcards, or labels
4.
a plural of ephemeron
Word Origin
C16; see ephemeral
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for ephemerae

ephemera

n.

late 14c., originally a medical term, from Medieval Latin ephemera (febris) "(fever) lasting a day," from fem. of ephemerus, from Greek ephemeros "lasting only one day, short-lived," from epi "on" (see epi-) + hemerai, dative of hemera "day," from PIE *amer- "day."

Sense extended 17c. to short-lived insects and flowers; general sense of "thing of transitory existence" is first attested 1751. Cf. Greek ephemeroi "men," literally "creatures of a day."

Online Etymology Dictionary, © 2010 Douglas Harper
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16
17
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