Found 2 items, similar to ephemeron.
English → English (WordNet) Definition: ephemeron ephemeron n : an insect that lives only for a day in its winged form [syn: ephemera] [also: ephemera (pl)]
English → English (gcide) Definition: Ephemeron Ephemeron \E*phem"e*ron\, n.; pl. Ephemera. [NL. See Ephemera.] (Zo["o]l.) One of the ephemeral flies. [1913 Webster]