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Definition of Pressor substance

Pressor substance: A substance that elevates the arterial blood pressure. For example, prostacyclin (prostaglandin PGI2) is a potent pressor substance. In medicine, pressor refers to raising the blood pressure. The word comes from the French verb "presser" meaning "to exert pressure" or "to squeeze."

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=25242
Last Editorial Review: 6/14/2012

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