insecticide

noun

in·​sec·​ti·​cide in-ˈsek-tə-ˌsīd 

plural insecticides

: an agent that destroys one or more species of insects

broadly : an agent that destroys insects as well as other small pests (such as mites or nematodes)

Aphids, mealybugs, and cyclamen mites are all common problems and can be controlled with any low-toxicity insecticide sold specifically for houseplants.

—Horticulture

Examples of insecticide in a Sentence

Recent Examples on the Web

In commercial orchards apple maggots are commonly controlled with insecticides targeting adult flies. — Encyclopedia Britannica, 29 Sep. 2026

Before releasing the ferrets, scientists dust prairie dog burrows with insecticide and scatter food pellets laced with fipronil, the same chemical used in flea control among pets. — Shi En Kim, AZCentral.com, 21 Sep. 2026

How To Get Rid Of Lovebugs You don’t need insecticides to deal with lovebugs. — Karen Brewer Grossman, Southern Living, 17 Sep. 2026

The department added that is has sprayed insecticide in 15 different community areas over the last several weeks. — Mary Kekatos, ABC News, 1 Sep. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1865, in the meaning defined above

Rhymes for insecticide

• acetamide
• acetonide
• acidified
• antimonide
• beatified
• benzaldehyde
• borohydride
• chalcogenide
• commodified
• decalcified
• declassified
• disaccharide

Kids Definition

insecticide

noun

in·​sec·​ti·​cide in-ˈsek-tə-ˌsīd 

: a chemical used to kill insects

insecticidal

(ˌ)in-ˌsek-tə-ˈsīd-ᵊl

adjective

Medical Definition

insecticide

noun

in·​sec·​ti·​cide in-ˈsek-tə-ˌsīd 

: an agent that destroys insects

insecticidal

(ˌ)in-ˌsek-tə-ˈsīd-ᵊl 

adjective