ephemerid

American

[ih-fem-er-id] / ɪˈfɛm ər ɪd /

noun

an insect of the order Ephemeroptera, comprising the mayflies.

ephemerid British

/ ɪˈfɛmərɪd /

noun

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

"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

Etymology

Origin of ephemerid

From the New Latin word Ephemeridae, dating back to 1870–75. See ephemeral, -id ²

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023