ephemerid noun.
[ɪ'fɛm(ǝ)rɪd, -'fi:m-] L19.[mod. Latin Ephemeridae (see below), from Ephemera genus name: see EPHEMERA noun1 & adjective, -ID3.]An insect of the order Ephemeroptera (cf.
EPHEMERA noun1 2),
esp. one of the family Ephemeridae.
[TahlilGaran] English Dictionary ▲