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pesewa the smaller monetary unit of Ghana. (Cf. cedi.)
pesky (informal) pestering or annoying.
peso the chief monetary unit of Argentina, Chile, Colombia, Cuba, the Dominican Republic, Guinea-Bissau, Mexico, and the Philippines, equaling one hundred centavos. [3 definitions]
pessary a device worn in the vagina to correct uterine displacement, or to prevent conception. [2 definitions]
pessimism the belief that events will turn out badly; tendency to expect the worst. (Cf. optimism.) [3 definitions]
pessimist one who usu. expects a bad outcome. (Cf. optimist.) [2 definitions]
pessimistic tending to expect unfavorable outcomes. [2 definitions]
pest someone or something that annoys or bothers; nuisance. [3 definitions]
pester to bother continually or repeatedly about what are felt to be petty matters; annoy. [2 definitions]
pesthole a place that is infested or likely to become infested with epidemic disease.
pesticide a chemical substance used to kill pests, esp. insects that harm crops.
pesticide resistance the evolved resistance of a pest to one or more pesticides.
pesticide-resistent of or pertaining to a pest population that has evolved tolerance to one or more pesticides.
pestiferous bringing, bearing, or breeding infectious disease; pestilential. [2 definitions]
pestilence an epidemic, usu. deadly, disease; plague. [2 definitions]
pestilent causing or tending to cause epidemic disease or death; pestilential or fatal. [3 definitions]
pestilential of, causing, or resembling a pestilence; pestilent. [2 definitions]
pestle a hand-held implement for grinding or pounding substances into powder, usu. in a mortar. [3 definitions]
pesto a sauce of ground fresh basil, pine nuts, garlic, and grated Parmesan cheese mixed with olive oil and served over pasta.
pest-resistant of or pertaining to a plant variety that has higher than normal tolerance to one or more pests, used esp. in reference to plants that have been genetically modified for the purpose of increasing tolerance to pests.
pet1 an animal, usu. domesticated or tamed, kept in one's home for companionship rather than practical use. [7 definitions]