A pesticide is a bug-killing poison. You may have to resort to using a pesticide to battle the ants that have invaded your kitchen, even if you hate killing any creature.

Pesticides are most often used to ward off insects or small animals living uninvited in a person's house, or in a garden or on a farm, when they are nibbling on plants or flowers. The Latin suffix cide means "killer," and in pesticide, it's combined with the English word pest, which means just what it sounds like — a troublesome annoyance.

Definitions of pesticide

n a chemical used to kill pests (as rodents or insects)

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acaracide, acaricide
a chemical agent used to kill mites
a pesticide or drug containing arsenic
insect powder, insecticide
a chemical used to kill insects
a chemical agent that kills lice
a colorless gas with a strong fishy smell; used as a pesticide
a drug that destroys the itch mite that causes scabies
sheep dip
a liquid mixture containing pesticides in which sheep are dipped to kill parasites
a pesticide in suspension or solution; intended for spraying
made of dried flower heads of pyrethrum plants
DDT, dichlorodiphenyltrichloroethane
an insecticide that is also toxic to animals and humans; banned in the United States since 1972
an insecticide that kills the larvae of insects
lead arsenate
a poisonous white solid (Pb3[AsO4]2) used as an insecticide
a white crystalline powder used as an agricultural insecticide
a yellow insecticide used as a dust or spray to control garden pests and house flies and mites
an insecticide that interferes with an insect's nervous system
a colorless and odorless toxic oil used as an insecticide
Paris green
a toxic double salt of copper arsenate and copper acetate
a white crystalline insecticide that has low toxicity for mammals; is used in home gardens; extracted from the roots of derris and cube
Type of:
chemical, chemical substance
material produced by or used in a reaction involving changes in atoms or molecules

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