Pressor
Causing a rise in blood pressure. A pressor base is a substance (chemically classified as a base) capable of raising the blood pressure. A pressor nerve is a nerve that, when stimulated, increases the blood pressure. A pressor reflex is a nerve reflex that constricts arterioles (small blood vessels) and thereby increases the blood pressure. A pressor substance is any substance that elevates arterial blood pressure. For example, prostacyclin (also known as prostaglandin PGI2) is a potent pressor agent. The word "pressor" comes from the French verb "presser" meaning "to exert pressure" or "to squeeze."
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Exciting to vasomotor activity; producing increased blood pressure; denoting afferent nerve fibers that, when stimulated, excite vasoconstrictors, which increase peripheral resistance. SYN: hypertensor. [L. premo, pp. pressus, to press]

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pres·sor 'pres-.ȯr, -ər adj raising or tending to raise blood pressure <\pressor substances> also involving or producing an effect of vasoconstriction <\pressor reflexes> <a \pressor action>

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n.
an agent that raises blood pressure. See vasoconstrictor.

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pres·sor (presґor) tending to increase blood pressure; said of nerves and chemical substances. Called also hypertensor.

Medical dictionary. 2011.

Look at other dictionaries:

  • Pressor — Press or, a. (Physiol.) Causing, or giving rise to, pressure or to an increase of pressure; as, pressor nerve fibers, stimulation of which excites the vasomotor center, thus causing a stronger contraction of the arteries and consequently an… …   The Collaborative International Dictionary of English

  • pressor — [pres′ər] adj. [ PRESS(URE) + (MOT)OR] designating a nerve which, when stimulated, causes a rise in blood pressure n. a substance capable of raising blood pressure …   English World dictionary

  • pressor — /pres euhr/, adj. Physiol. causing an increase in blood pressure; causing vasoconstriction. [1885 90; attributive use of LL pressor presser, equiv. to L *pret , var. s. of premere to PRESS1 + tor TOR, with tt > ss ] * * * …   Universalium

  • pressor — pres•sor [[t]ˈprɛs ər[/t]] adj. 1) phl causing an increase in blood pressure; causing vasoconstriction 2) phl a substance or nerve that causes an increase in blood pressure; vasoconstrictor • Etymology: 1885–90; < LL pressor presser = L *pret …   From formal English to slang

  • pressor — I noun any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure • Syn: ↑vasoconstrictor,… …   Useful english dictionary

  • pressor — adjective Etymology: Late Latin, one that presses, from Latin premere to press more at press Date: circa 1890 raising or tending to raise blood pressure; also involving vasoconstriction …   New Collegiate Dictionary

  • pressor — adj. causing a rise in blood pressure …   English contemporary dictionary

  • pressor — adjective Physiology producing an increase in blood pressure by stimulating constriction of the blood vessels …   English new terms dictionary

  • pressor — pres·sor …   English syllables

  • pressor — n. an agent that raises blood pressure. See: vasoconstrictor …   The new mediacal dictionary

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