the state of being weak in health or body, especially from old age
vanadium
Noun
a soft silvery white toxic metallic element used in steel alloys
vellum
Noun
fine parchment prepared from the skin of a young animal e.g. a calf or lamb
vellum
Noun
a heavy creamy-colored paper resembling parchment
valeric acid
Noun
a clear liquid carboxylic acid used in perfumes and drugs
vomitus
Noun
the matter ejected in vomiting
vitreous silica
Noun
a colorless glass made of almost pure silica
volcanic glass
Noun
a kind of natural glass produced when molten lava cools very rapidly
volatile oil
Noun
an oil having the odor or flavor of the plant from which it comes
volcanic rock
Noun
an extrusive igneous rock solidified near or on the surface of the Earth
vegetable silk
Noun
a plant fiber from the kapok tree
verd antique
Noun
a dark green impure marble
verde antique
Noun
a dark green impure marble
vulcanite
Noun
a hard nonresilient rubber formed by vulcanizing natural rubber
vinyl cyanide
Noun
a colorless liquid unsaturated nitrile made from propene
vat dye
Noun
a water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material
vat color
Noun
a water-insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material
viricide
Noun
an agent (physical or chemical) that inactivates or destroys viruses
virucide
Noun
an agent, physical or chemical, that inactivates or destroys viruses
vinyl resin
Noun
a thermoplastic derived by polymerization from compounds containing the vinyl group
visual purple
Noun
a red photopigment in the retinal rods of vertebrates
vitamin
Noun
any of a group of organic substances essential in small quantities to normal metabolism
vitamin A
Noun
any of several fat-soluble vitamins essential for normal vision
vitamin A1
Noun
an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
vitamin A2
Noun
a viscous alcohol that is less active in mammals than is vitamin A1
vitamin B complex
Noun
originally thought to be a single vitamin but now separated into several B vitamins
vitamin B1
Noun
a B vitamin that prevents beriberi
vitamin B12
Noun
a B vitamin that is used to treat pernicious anemia
vitamin B2
Noun
a B vitamin that prevents skin lesions and weight loss
valine
Noun
an essential amino acid found in proteins
vanadate
Noun
a salt or ester of vanadic acid
vanadinite
Noun
a mineral consisting of chloride and vanadate of lead
vanadium pentoxide
Noun
any of various oxyacids of vanadium
vanadic acid
Noun
any of the various oxyacids of vanadium
vanadium steel
Noun
steel alloyed with vanadium for greater strength and high-temperature stability
vermiculite
Noun
any of a group of yellow or brown hydrous silicate minerals having a micaceous structure
vesuvianite
Noun
a green or yellow or brown mineral consisting of a hydrated silicate
vesuvian
Noun
a green, yellow or brown mineral consisting of a hydrated silicate
vinyl
Noun
shiny and tough and flexible plastic
vinyl
Noun
a univalent chemical radical derived from ethylene
vinyl group
Noun
a univalent chemical radical derived from ethylene
vinyl radical
Noun
a univalent chemical radical derived from ethylene
vinyl polymer
Noun
a thermoplastic derived by polymerization from compounds containing the vinyl group
vegetable wax
Noun
a waxy substance obtained from plants, especially from the trunks of certain palms
vernix
Noun
a white cheeselike protective material that covers the skin of a fetus
vitamin B6
Noun
a B vitamin that is essential for metabolism of amino acids and starch
vitamin Bc
Noun
a B vitamin that is essential for cell growth and reproduction