I. ə̇nˈsektəˌsīd noun
( -s )
Etymology: insecti- + -cide (killing)
: the killing of insects
a carefully controlled mass insecticide was going on — Newsweek
II. noun
( -s )
Etymology: International Scientific Vocabulary insecti- + -cide (killer)
: an agent that destroys insects ; broadly : an agent hostile or repellent to insects — compare larvicide