derived from νεύρον: half, and πτερόν: wing, in the Linnaean system, the second order of insects, comprehending twelve genera, viz. the Blatta, mantis, gryllus, fulgora, cicada, notoneta, nepa, cinex, aphis, chermes, coccus, and thrips, and a great number of species. See ENTOMOLOGY, INSECTS, and ZOOLOGY.