from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A chemical substance used to destroy or inhibit the growth of plants, especially weeds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A substance used to kill plants.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a chemical agent that destroys plants or inhibits their growth
herb + -cide (Wiktionary)