| 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. |
| vasopressin |
a hormone secreted by the posterior lobe of the pituitary gland which increases blood pressure by causing capillaries to constrict. |
| vasopressor |
causing a rise in blood pressure by constricting the blood vessels. [2 definitions] |
| vassal |
in the Middle Ages, one who was granted the use of land in return for allegiance and service to a feudal lord. [2 definitions] |
| vassalage |
the state or condition of being a vassal. [2 definitions] |
| vast |
immense in size or area. [3 definitions] |
| vastly |
to a very great degree; very much. |