the GNU version of the Collaborative International Dictionary of English
n. An agent or preparation for destroying insects; an insect powder or spray.
The Century Dictionary and Cyclopedia
n. One who or that which kills insects.
n. The act of killing insects.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a chemical used to kill insects
Word Usage
"As any environmentalist can tell you, insecticide is not very nice stuff — especially if you breathe it, which many Third World farmers do as they walk through their fields with backpack sprayers."