• (a.) Two-nerved; -- applied to leaves which have two longitudinal ribs or nerves. • (a.) Having only two nerves, as the wings of some insects.
Bi·nerv'ate adjective [ Latin bis twice + nervus sinew, nerve.] 1. (Botany) Two- nerved; -- applied to leaves which have two longitudinal ribs or nerves. 2. (Zoology) Having only two nerves, as the wings of some insects.