Kā'ty-did, n.

n. (Entom.) An insect of a pale-green color (Plataphyllum concavum), closely allied to the grasshoppers.

The katydids are abundant in the United States during the autumn, and at night the males, by means of membranes in their wing-covers, make a peculiar harsh sound, nearly articulate, resembling the combination ka-ty-did; whence the name.