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
vasodilator
Noun
a drug that causes dilation of blood vessels
vasodilative
Noun
a drug that causes dilation of blood vessels
vasopressor
Noun
any agent that produces vasoconstriction and a rise in blood pressure, usually understood as increased arterial pressure
vaulting horse
Noun
a gymnastic horse without pommels and with one end elongated
vehicle
Noun
a conveyance that transports people or objects
vehicle
Noun
a medium for the expression or achievement of something
vehicle
Noun
any inanimate object, such as a towel, money, or clothing that can transmit infectious agents from one person to another
vehicle
Noun
any substance that facilitates the use of a drug or pigment or other material that is mixed with it
velodrome
Noun
a banked oval track for bicycle or motorcycle racing
velour
Noun
heavy fabric that resembles velvet
velours
Noun
a heavy fabric that resembles velvet
velveteen
Noun
a usually cotton fabric with a short pile imitating velvet
vending machine
Noun
a slot machine for selling goods
Venn diagram
Noun
a diagram that uses circles to represent mathematical or logical sets pictorially
venogram
Noun
an X ray of a vein injected with a radiopaque contrast medium
venthole
Noun
a hole for the escape of gas or air
vent-hole
Noun
a hole for the escape of gas or air
vat
Noun
a large open vessel for holding or storing liquids
vacuum tube
Noun
an electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
ventriloquist's dummy
Noun
a wooden dummy into which a ventriloquist projects the voice
venturi
Noun
a tube with a constriction
vacation home
Noun
a dwelling, often a second home, where one lives while on vacation
vaccine
Noun
immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
virtual storage
Noun
memory created by using the hard disk to simulate additional random-access memory
viscometer
Noun
a measuring instrument for measuring viscosity
verge
Noun
a grass border along a road
verge
Noun
the limit beyond which something happens or changes
verge
Noun
a ceremonial or emblematic staff
verge
Noun
a region marking a boundary
verge
Verb
border on
viscosimeter
Noun
a measuring instrument for measuring viscosity
viscose rayon
Noun
a rayon fabric made from viscose (cellulose xanthate) fibers
viscose
Noun
a rayon fabric made from viscose (cellulose xanthate) fibers
viscose
Noun
a cellulose ester obtained by treating cellulose with caustic soda
vermicide
Noun
an agent that kills worms, especially those in the intestines
vermiculation
Noun
a decoration consisting of wormlike carvings
vermiculation
Noun
the process of wavelike muscle contractions of the alimentary tract that moves food along
vise
Noun
a holding device attached to a workbench
vermifuge
Noun
a medication capable of causing the evacuation of parasitic intestinal worms
visible speech
Noun
a spectrogram of speech
visible speech
Noun
a phonetic alphabet invented by Melville Bell in the 19th century
vernier caliper
Noun
a caliper with a vernier scale for very fine measurements
vernier micrometer
Noun
a caliper with a vernier scale for very fine measurements
visual display unit
Noun
a term for a video display, such as a computer monitor
VDU
Noun
a term for a video display, such as a computer monitor
vdu
Noun
a term for a video display, such as a computer monitor
vernier scale
Noun
a small measuring device with a movable scale that slides along a main scale, used for precision length measurements in science and engineering