Noun | 1. | ![]() animal order - the order of animals class Hexapoda, class Insecta, Hexapoda, Insecta - insects; about five-sixths of all known animal species neuropteran, neuropteron, neuropterous insect - insect having biting mouthparts and four large membranous wings with netlike veins family Myrmeleontidae, Myrmeleontidae - antlions Chrysopidae, family Chrysopidae - green lacewings family Hemerobiidae, Hemerobiidae - brown lacewings Megaloptera, suborder Megaloptera - in some classifications considered a separate order: alderflies; dobsonflies; snake flies family Mantispidae, Mantispidae - mantispids family Sisyridae, Sisyridae - an arthropod family of the order Neuroptera that includes spongeflies |