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Webster's 1913 Dictionary

PRESSOR

PRESSOR Press "or, a. (Physiol.)

Defn: 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 increase of the arterial blood pressure; --opposed to depressor. Landois & Stirling.

New American Oxford Dictionary

pressor

pres sor |ˈpresər ˈprɛsər | ▶adjective [ attrib. ] Physiology producing an increase in blood pressure by stimulating constriction of the blood vessels: a pressor response.

Oxford Dictionary

pressor

pres |sor |ˈprɛsə | ▶adjective Physiology producing an increase in blood pressure by stimulating constriction of the blood vessels: a pressor response.