from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white crystalline compound, C23H22O6, extracted from the roots of derris and cubé and used as an insecticide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an insecticide extracted from the roots of the plant derris; it is toxic to humans and other mammals
from the GNU version of the Collaborative International Dictionary of English
- n. A chemical substance (C23H22O6) extracted from the root of the derris (Derris elliptica, Derris malaccensis, and other species), used in treatment of scabies and as an insecticide for external infestation by chiggers in human medicine, and in veterinary medicine for the treatment of infestations with fleas, ticks, and lice.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a white crystalline insecticide that has low toxicity for mammals; is used in home gardens; extracted from the roots of derris and cube
Japanese rōten, derris + -one.(American Heritage® Dictionary of the English Language, Fourth Edition)