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Noun: ephemerid  i'fe-mu-rid
  1. Short-lived insect, typically referring to mayflies
    "The ephemerid's brief adult life is dedicated solely to reproduction";
    - ephemeropteran

Derived forms: ephemerids

Type of: insect

Part of: Ephemerida, Ephemeroptera, order Ephemerida, order Ephemeroptera