derris definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a genus (Derris) of woody East Indian plants of the pea family, from whose roots rotenone is extracted
Origin: Modern Latin ; from Classical Greek hide ; from Indo-European base an unverified form der-: see derma
derris definition by American Heritage Dictionary
Any of various usually woody vines of the genus Derris of tropical Asia, whose roots yield the insecticide rotenone.
Origin: New Latin, genus name, from Greek, covering; see der- in Indo-European roots.