01 n. A neuropterous insect of the genus Ephemera and related genera, of many species, and inhabiting fresh water in the larval state; the epheme…
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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.(Zool.) [Outdated] See: Ephemeral