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1. A colloquial term for any small insect or arthropod, esp. of the order Hemiptera, that has sucking mouth parts, incomplete metamorphosis, and two pairs of wings, the fore pair being half membranous. See: bedbug; chigger
2. A colloquial term for a disease-causing germ or microorganism.
Any member of the family Reduviidae. Many are predaceous; others are bloodsucking. Panstrongylus, Triatoma, and Rhodnius are vectors of Chagas disease.See: conenose; trypanosomiasis