Wielki słownik angielsko-polski red. nacz D. Jemielniak, M. Miłkowski

(Noun) przyroda jętka, efemeryda;

Wordnet angielsko-polski

(slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days)
jętka, efemeryda
synonim: mayfly
synonim: shadfly