ephemerid

e·phem·er·id

E0173400 (ĭ-fĕm′ər-ĭd)n. A mayfly, especially one of the family Ephemeridae.

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[From New Latin Ephēmeridae, former order name, from Greek ephēmeron, mayfly; see ephemeron.]

ephemerid

(ɪˈfɛmərɪd) n (Animals) any insect of the order Ephemeroptera (or Ephemerida), which comprises the mayflies. Also called: ephemeropteran [C19: from New Latin Ephēmerida, from Greek ephēmeros short-lived + -id²]

may•fly

(ˈmeɪˌflaɪ)

n., pl. -flies. any of numerous insects of the family Ephemeridae, with large transparent forewings and threadlike tails, living for a relatively long period as an aquatic nymph and only for two days or less as an adult. [1645–55]

Thesaurus

Noun

1.

ephemerid - short-lived insect ephemeropteraninsect - small air-breathing arthropodEphemerida, Ephemeroptera, order Ephemerida, order Ephemeroptera - mayfliesPlectophera - in some former classifications: name for the Ephemeropteradayfly, mayfly, shadfly - slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days