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
A toxin called rotenone would first exterminate non-native fish from the nine-mile creek section—an idea that rankles some local anglers—under a proposal by state and federal biologists.
The poison, called rotenone, isn't scheduled to be dumped into the canal until after dark.
The fish poison, called rotenone, will be dumped into the canal just above the barrier on Dec. 3.
Thousands of gallons of fish poison, called rotenone, were dumped in the canal around 8 p.m.
Chief Petty Officer Robert Lanier of the U.S. Coast Guard said workers began dumping a fish toxin called rotenone into the canal about 8 p.m. and would continue the poisoning until some time Thursday morning.
Officials will spread a fish toxin called rotenone near Lockport, Ill., hoping to kill the carp.
Officials plan then to treat a 6-mile section of the canal with a fish toxin called rotenone to prevent Asian carp from advancing.
The poison, called rotenone, was expected to kill some 200,000 pounds of all types of fish.
One option involves dumping a fish poison called rotenone into carp-infested areas.
They have tried in some areas here in Appalachia to rotenone streams and kill off browns and rainbows to make way for native southern strain brookies where feasible.