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varoom variant of vroom.
varsity the primary team that competes in a sport or other extramural contest on behalf of a school, college, or the like. [2 definitions]
vary to change; alter; modify. [4 definitions]
vas an anatomical or biological vessel or duct.
Vasco da Gama a Portuguese explorer who established the first all-water trade route between Europe and India (b.1460?--d.1524).
Vasco Nez de Balboa a Spanish explorer and the first European discoverer of the Pacific Ocean (b.1475?--d.1519?).
vascular composed of, containing, or having to do with tubes or ducts that carry a fluid, such as blood or lymph in animals or sap in plants, or with a system of such tubes or ducts.
vascular bundle in botany, an aggregate plant unit composed of strands of conductive and supportive tissue.
vasculitis inflammation of a blood or lymph vessel.
vas deferens the duct that carries sperm from the testicle to the ejaculatory duct of the penis.
vase an open container of glass, porcelain, pottery, or the like, usu. taller than it is wide, used as an ornament or to hold cut flowers.
vasectomy a surgical operation in which a male's sperm-carrying tube is cut and tied or removed, as a means of birth control.
Vaseline trademark for petrolatum.
vaso- blood vessel. [2 definitions]
vasoconstriction constriction or narrowing of a blood vessel or vessels, as in response to a nerve impulse.
vasoconstrictor a nerve or drug that causes constriction of the blood vessels. [2 definitions]
vasodilatation see "vasodilation."
vasodilation dilation or widening of a blood vessel or vessels, as in response to a nerve impulse.
vasodilator a nerve or drug that causes dilation of the blood vessels. [2 definitions]
vasoinhibitor a drug or other agent that inhibits the action of the vasomotor nerves.
vasomotor controlling the width of blood vessels, as some nerves or certain drugs; causing vasoconstriction or vasodilatation.