Ephemerid definition

ĭ-fĕmər-ĭd
A mayfly, especially one of the family Ephemeridae.
noun
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noun
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(zoology) Any member of the Ephemeridae.
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Other Word Forms

Noun

Singular:
ephemerid
Plural:
ephemerids

Origin of ephemerid

  • From New Latin Ephēmeridae former order name from Greek ephēmeron mayfly ephemeron

    From American Heritage Dictionary of the English Language, 5th Edition