Found 2 items, similar to dayfly.
English → English (WordNet) Definition: dayfly 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]
English → English (gcide) Definition: Dayfly Dayfly \Day"fly`\ (d[=a]"fl[imac]`), n. (Zo["o]l.) 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. [1913 Webster]