[stone fly] n (15c): any of an order (Plecoptera) of insects with an aquatic carnivorous nymph having gills and an adult having long antennae, two pairs of membranous wings, and usu. long cerci
STONE FLY
Meaning of STONE FLY in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012