herbicide

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herbicide

 [her´bĭ-sīd]
an agent that is destructive to weeds or causes an alteration in their normal growth.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

herb·i·cide

(ĕr'bi-sīd)
Any chemical compound designed to kill plants. Herbicides have been used in military operations for deforestation, but the U.S. military excludes herbicides from being classified as chemical-warfare agents.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

herbicide

any chemical that kills plants. Herbicides can be highly selective. For example, 2,4-D only kills DICOTYLEDONS (broad-leaved plants), leaving MONOCOTYLEDONS unharmed.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Conversely, dithiopyr applied PRE allowed a maximum of 5% coverage by the end of the experiments.
For weed control in bermudagrass seedlings, quinclorac is safe on bermudagrass seedlings at 0 WAE or later, and dithiopyr is safe when applied 1 WAE or later.
Seeding and application dates of quinclorac and dithiopyr on newly seeded Mirage bermudagrass and Zenith zoysiagrass in the herbicide safety study.
BAS 514 and dithiopyr for weed control in cool season turfgrasses.
The observed effect on mitosis caused by Ala-Ala was different from that of the dinitroanilines, carbamates, and dithiopyr, all of which affect the mitotic apparatus (Vaughn and Lehnen, 1991) and was similar to the chloracetamides and sulfonylurea herbicides, which affect plant metabolic processes (Deal and Hess, 1980; Rost, 1984).
Effects of the herbicide dithiopyr on cell division in wheat root tips.