Definition of "pesticide" []

• A chemical used to kill pests, especially insects. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The term pesticide also includes these substances:"
• "Though often misunderstood to refer only to insecticides, the term pesticide also applies to herbicides, fungicides, rodenticides, molluscicides and various other substances used to control pests."
• "Though often misunderstood to refer only to insecticides, the term pesticide also applies to herbicides, fungicides, and various other substances used to control pests."