Definitions for dayflyˈdeɪˌflaɪ
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Random House Webster's College Dictionary
day•flyˈdeɪˌflaɪ(n.)(pl.)-flies.
an adult mayfly.
Category: Entomology
Origin of dayfly:
1595–1605
Princeton's WordNet
mayfly, dayfly, shadfly(noun)
slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days
Wiktionary
dayfly(Noun)
A mayfly.
Origin: since the adults typically live only for a day.
Webster Dictionary
Dayfly(noun)
a neuropterous insect of the genus Ephemera and related genera, of many species, and inhabiting fresh water in the larval state; the ephemeral fly; -- so called because it commonly lives but one day in the winged or adult state. See Ephemeral fly, under Ephemeral
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