Try Our Apps


Avoid these words. Seriously.


[ih-fem-er-id] /ɪˈfɛm ər ɪd/
an insect of the order Ephemeroptera, comprising the mayflies.
Also called ephemeropteran.
Origin of ephemerid
From the New Latin word Ephemeridae, dating back to 1870-75. See ephemeral, -id2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for ephemerid
Historical Examples
  • They are like the ephemerid insects which live for a summer day only.

    The Romance of Plant Life G. F. Scott Elliot
  • The name of the family to which they belong, ephemerid, suggests their ephemeral existence.

  • Those examples are provided by Rotifera (inferior worms) and by ephemerid.

  • In the ephemerid they lie in planes approaching the vertical, slightly diverging from each other towards their extremities.

    Old Flies in New Dresses Charles Edward Walker
  • I do not propose in this work to deal with ephemerid, as the wings in the imitations now sold are in the natural position.

    Old Flies in New Dresses Charles Edward Walker
British Dictionary definitions for ephemerid


any insect of the order Ephemeroptera (or Ephemerida), which comprises the mayflies Also called ephemeropteran
Word Origin
C19: from New Latin Ephēmerida, from Greek ephēmeros short-lived + -id²
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
Cite This Source

Word of the Day

Nearby words for ephemerid

Word Value for ephemerid

Scrabble Words With Friends