Also found in: Thesaurus, Wikipedia.


A solid, toxic, selective herbicide, C9H7O3Cl3, formerly used chiefly to control woody plants and aquatic weeds.

[Probably Latin silva, forest + ex(terminator).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) a herbicide that eradicates weeds and woody plants
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.silvex - a herbicide that is effective in controlling woody plants but is toxic to animals
herbicide, weed killer, weedkiller - a chemical agent that destroys plants or inhibits their growth
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
She noted that the company supplies bio/plant-based and compostable food service packaging for brands such as Avani, Biopak, Vegware and Silvex (takeaway boxes, straws, and carry bags, among others), made from corn, sugarcane, cassava, bamboo -- all rapidly renewable and has low impact on the environment.
Silvex, Things remembered; Time, iBen; Pixel, Piano, 3D Planet, iMall; Hay Optic; JonRic Salon & Day SPA, as well as Prolife fitness
CATS and its allies filed a new motion that sought to ban 2,4-D, 2,4,5-T, and Silvex. (40) Tensions rose as local residents confronted Forest Service and county officials determined to carry out spraying operations.
Silvex aluminum flake pigments range from very fine particle size for a satin metallic appearance to larger-sized particles for a sparkle effect.
We've recently taken the Triple-Shock design a step further by adding a streamlined Delrin tip and a patented, heavier-than-lead Silvex core.
A denser-than-lead Silvex core moves the center of gravity rearward, producing optimum ballistic performance, maximum penetration and the accuracy Triple-Shock X-Bullets are famous for, and typically provides double-diameter expansion and 100-percent weight retention: (800) 574-9200;
Herbicides (amitrole, silvex, ammonium sulfamate, or 2,4-D acetic acid) can be used for control of large areas of poison ivy, oak, or sumac but are not species-specific and have the potential of killing surrounding plants or coming in contact with children or pets (Rietschel & Fowler, 2001a).