dayfly
蜉蝣
Day·fly n. Zool. 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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dayfly
n : slender insect with delicate membranous wings having an
aquatic larval stage and terrestrial adult stage usually
lasting less than two days [syn: mayfly, shadfly]