Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

ephemerid

play
noun ephem·er·id \i-ˈfe-mə-rəd\

Definition of ephemerid

  1. :  mayfly



Origin and Etymology of ephemerid

ultimately from Greek ephēmeron


First Known Use: 1872


Seen and Heard

What made you want to look up ephemerid? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

at a gallop

Get Word of the Day daily email!