- an insect of the order Ephemeroptera, comprising the mayflies.
Origin of ephemerid
Also called ephemeropteran.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ephemerid
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.Life of Elie Metchnikoff, 1845-1916
In the Ephemerid they lie in planes approaching the vertical, slightly diverging from each other towards their extremities.
I do not propose in this work to deal with Ephemerid, as the wings in the imitations now sold are in the natural position.
- any insect of the order Ephemeroptera (or Ephemerida), which comprises the mayfliesAlso called: ephemeropteran
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