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ephemerid

[ ih-fem-er-id ]
/ ɪˈfɛm ər ɪd /
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noun

an insect of the order Ephemeroptera, comprising the mayflies.

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Also called ephemeropteran.

Origin of ephemerid

From the New Latin word Ephemeridae, dating back to 1870–75. See ephemeral, -id2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for ephemerid

ephemerid
/ (ɪˈfɛmərɪd) /

noun

any insect of the order Ephemeroptera (or Ephemerida), which comprises the mayfliesAlso called: ephemeropteran

Word Origin for ephemerid

C19: from New Latin Ephēmerida, from Greek ephēmeros short-lived + -id ²
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
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