Any one of numerous species of long-winged, migratory, orthopterous insects, of the family Acrididæ, allied to the grasshoppers; esp., (Edipoda migratoria, syn. Pachytylus migratoria, and Acridium perigrinum, of Southern Europe, Asia, and Africa. In the United States the related species with similar habits are usually called grasshoppers. See Grasshopper.
a large GRASSHOPPER showing pronounced, density-dependent polymorphism, that is, the development of different types of individuals brought about by changes in the size, or numbers, of their population