Definition of ephemeropteran in US English:

ephemeropteran

noun & adjective

Entomology
  • See Ephemeroptera

    • ‘These aquatic larvae, often ephemeropterans or dipterans, are readily available in the lower water column and interstitial spaces that these juveniles inhabit.’
    • ‘They are the ephemeropteran equivalents of theology.’

Pronunciation

ephemeropteran

/-tərən/