dayfly Meaning, Definition & Usage
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noun slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days
shadfly; mayfly.
WordNet
Day"fly` noun
Definitions
(Zoöl.) 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. SeeEphemeral fly , underEphemeral .
