leaf insect

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various chiefly Asian insects of the family Phyllidae that resemble leaves in color and form. Also called walking leaf.

Century Dictionary and Cyclopedia

1. n. An orthopterous insect of the family Phasmidæ: so called from its mimetic resemblance to the leaf of a plant. Also called walking-leaf.

GNU Webster's 1913

1. n. (Zoöl.) any one of several genera and species of orthopterous insects, esp. of the genus Phyllium, in which the wings, and sometimes the legs, resemble leaves in color and form. They are common in Southern Asia and the East Indies.

WordNet 3.0

1. n. tropical insect having a flattened leaflike body; common in southern Asia and the East Indies