[pes-tuh-sahyd] /ˈpɛs təˌsaɪd/

a chemical preparation for destroying plant, fungal, or animal .
a chemical used for killing pests, esp insects and rodents

1939, a hybrid coined from English pest + Latinate -cide.

pesticide pes·ti·cide (pěs’tĭ-sīd’)
A chemical used to kill pests, especially insects.
A chemical used to kill harmful animals or plants. Pesticides are used especially in agriculture and around areas where humans live. Some are harmful to humans, either from direct contact or as residue on food, or are harmful to the environment because of their high toxicity, such as DDT (which is now banned in many countries). Pesticides include fungicides, herbicides, insecticides, and rodenticides. See more at fungicide, herbicide, insecticide.


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  • Pestiferous

    [pe-stif-er-uh s] /pɛˈstɪf ər əs/ adjective 1. bringing or bearing disease. 2. . 3. pernicious; evil. 4. Informal. mischievous; troublesome or annoying. /pɛˈstɪfərəs/ adjective 1. (informal) troublesome; irritating 2. breeding, carrying, or spreading infectious disease 3. corrupting; pernicious adj. mid-15c., “mischievous, pernicious,” figurative use of Latin pestiferus “that brings plague or destruction,” variant of pestifer […]

  • Pestle

    [pes-uh l, pes-tl] /ˈpɛs əl, ˈpɛs tl/ noun 1. a tool for pounding or grinding substances in a mortar. 2. any of various appliances for pounding, stamping, etc. verb (used with object), pestled, pestling. 3. to pound or grind with or as if with a pestle. verb (used without object), pestled, pestling. 4. to work […]

  • Pesto

    [pes-toh] /ˈpɛs toʊ/ noun, Italian Cookery. 1. a sauce typically made with basil, pine nuts, olive oil, and grated Parmesan blended together and served hot or cold over pasta, fish, or meat. /ˈpɛstəʊ/ noun 1. a sauce for pasta, consisting of basil leaves, pine nuts, garlic, oil, and Parmesan cheese, all crushed together n. olive […]

  • Pes varus

    pes varus pes var·us (vâr’əs) n. See talipes varus.

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