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trypsinogen
inactive precursor of trypsin; a substance secreted by the pancreas and converted to active trypsin by enterokinase in the small intestine
trypsinogen: inactive precursor of trypsin; a substance secreted by the pancreas and converted to active trypsin by enterokinase in the small intestine
tryptophan
an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin
tryptophan: an amino acid that occurs in proteins; is essential for growth and normal metabolism; a precursor of niacin
tuna_oil
an oil obtained from tuna
tuna_oil: an oil obtained from tuna
tundra_soil
a black mucky soil with a frozen subsoil that is characteristic of Arctic and subarctic regions
tundra_soil: a black mucky soil with a frozen subsoil that is characteristic of Arctic and subarctic regions
tungsten_steel
a very hard heat-resistant steel containing tungsten
tungsten_steel: a very hard heat-resistant steel containing tungsten
tungstate
a salt of tungstic acid
tungstate: a salt of tungstic acid
tungstic_acid
an oxyacid of tungsten (often polymeric in nature) formed by neutralizing alkaline tungstate solutions
tungstic_acid: an oxyacid of tungsten (often polymeric in nature) formed by neutralizing alkaline tungstate solutions
turquoise
a blue to grey green mineral consisting of copper aluminum phosphate
turquoise: a blue to grey green mineral consisting of copper aluminum phosphate
typewriter_paper
writing paper suitable for use in a typewriter
typewriter_paper: writing paper suitable for use in a typewriter
tyramine
amino acid derived from tyrosine; has a sympathomimetic action; found in chocolate and cola drinks and ripe cheese and beer
tyramine: amino acid derived from tyrosine; has a sympathomimetic action; found in chocolate and cola drinks and ripe cheese and beer
tyrosine
an amino acid found in most proteins; a precursor of several hormones
tyrosine: an amino acid found in most proteins; a precursor of several hormones
ubiquinone
any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
ubiquinone: any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
ultramarine
blue pigment made of powdered lapis lazuli
ultramarine: blue pigment made of powdered lapis lazuli
French_blue
ultramarine pigment prepared artificially
French_blue: ultramarine pigment prepared artificially
umber
an earth pigment
umber: an earth pigment
raw_umber
greenish brown pigment
raw_umber: greenish brown pigment
burnt_umber
dark brown pigment obtained by heating umber
burnt_umber: dark brown pigment obtained by heating umber
undecylenic_acid
an acid that is a component of perspiration
undecylenic_acid: an acid that is a component of perspiration
unleaded_gasoline
gasoline that has not been treated with a lead compound
unleaded_gasoline: gasoline that has not been treated with a lead compound
undercut
the material removed by a cut made underneath
undercut: the material removed by a cut made underneath
urease
an enzyme that catalyzes the hydrolysis of urea into carbon dioxide and ammonia; is present in intestinal bacteria
urease: an enzyme that catalyzes the hydrolysis of urea into carbon dioxide and ammonia; is present in intestinal bacteria
urethane
an ester of carbamic acid
urethane: an ester of carbamic acid
uracil
a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
uracil: a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine
uraninite
a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
uraninite: a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
uranium_ore
any ore from which uranium can be extracted
uranium_ore: any ore from which uranium can be extracted
uranyl
the bivalent radical UO2 which forms salts with acids
uranyl: the bivalent radical UO2 which forms salts with acids
uranyl_nitrate
a yellow salt obtained by the reaction of uranium salts with nitric acid
uranyl_nitrate: a yellow salt obtained by the reaction of uranium salts with nitric acid
uranyl_oxalate
a salt obtained by the reaction of uranium salts with oxalic acid
uranyl_oxalate: a salt obtained by the reaction of uranium salts with oxalic acid
urea
the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
urea: the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
uric_acid
a white tasteless odorless crystalline product of protein metabolism; found in the blood and urine
uric_acid: a white tasteless odorless crystalline product of protein metabolism; found in the blood and urine
urate
a salt of uric acid
urate: a salt of uric acid
tophus
a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout
tophus: a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout
valine
an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults
valine: an essential amino acid found in proteins; important for growth in children and nitrogen balance in adults
linseed
the seed of flax used as a source of oil
linseed: the seed of flax used as a source of oil
linseed_oil
a drying oil extracted from flax seed and used in making such things as oil paints
linseed_oil: a drying oil extracted from flax seed and used in making such things as oil paints
tung_oil
a yellow oil obtained from the seeds of the tung tree
tung_oil: a yellow oil obtained from the seeds of the tung tree
chaulmoogra_oil
an oil from chaulmoogra trees; used in treatment of skin diseases and leprosy
chaulmoogra_oil: an oil from chaulmoogra trees; used in treatment of skin diseases and leprosy
vanadate
a salt or ester of vanadic acid; an anion containing pentavalent vanadium
vanadate: a salt or ester of vanadic acid; an anion containing pentavalent vanadium
vanadinite
a mineral consisting of chloride and vanadate of lead; a source of vanadium
vanadinite: a mineral consisting of chloride and vanadate of lead; a source of vanadium
vanadium_pentoxide
any of various oxyacids of vanadium; known mostly in the form of its salts
vanadium_pentoxide: any of various oxyacids of vanadium; known mostly in the form of its salts
vanadium_steel
steel alloyed with vanadium for greater strength and high-temperature stability
vanadium_steel: steel alloyed with vanadium for greater strength and high-temperature stability
vellum
a heavy creamy-colored paper resembling parchment
vellum: a heavy creamy-colored paper resembling parchment
vermiculite
any of a group of yellow or brown hydrous silicate minerals having a micaceous structure
vermiculite: any of a group of yellow or brown hydrous silicate minerals having a micaceous structure
very_low_density_lipoprotein
large lipoproteins rich in triglycerides; VLDLs circulate through the blood giving up their triglycerides to fat and muscle tissue until the VLDL remnants are modified and converted into LDL
very_low_density_lipoprotein: large lipoproteins rich in triglycerides; VLDLs circulate through the blood giving up their triglycerides to fat and muscle tissue until the VLDL remnants are modified and converted into LDL
vesuvianite
a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone
vesuvianite: a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone
vinegar
dilute acetic acid
vinegar: dilute acetic acid
vinyl
shiny and tough and flexible plastic; used especially for floor coverings
vinyl: shiny and tough and flexible plastic; used especially for floor coverings
vinyl
a univalent chemical radical derived from ethylene
vinyl: a univalent chemical radical derived from ethylene
vinyl_polymer
a thermoplastic derived by polymerization from compounds containing the vinyl group
vinyl_polymer: a thermoplastic derived by polymerization from compounds containing the vinyl group
iodopsin
a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision
iodopsin: a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision
visual_purple
a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
visual_purple: a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
photopigment
a special pigment found in the rods and cones of the retina
photopigment: a special pigment found in the rods and cones of the retina
vitamin
any of a group of organic substances essential in small quantities to normal metabolism
vitamin: any of a group of organic substances essential in small quantities to normal metabolism
fat-soluble_vitamin
any vitamin that is soluble in fats
fat-soluble_vitamin: any vitamin that is soluble in fats
water-soluble_vitamin
any vitamin that is soluble in water
water-soluble_vitamin: any vitamin that is soluble in water
vitamin_A
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
vitamin_A: any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
vitamin_A1
an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
vitamin_A1: an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene
vitamin_A2
a viscous alcohol that is less active in mammals than is vitamin A1
vitamin_A2: a viscous alcohol that is less active in mammals than is vitamin A1
provitamin
vitamin precursor; a substance that is converted into a vitamin in animal tissues
provitamin: vitamin precursor; a substance that is converted into a vitamin in animal tissues
provitamin_A
an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
provitamin_A: an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
B-complex_vitamin
originally thought to be a single vitamin but now separated into several B vitamins
B-complex_vitamin: originally thought to be a single vitamin but now separated into several B vitamins
vitamin_B1
a B vitamin that prevents beriberi; maintains appetite and growth
vitamin_B1: a B vitamin that prevents beriberi; maintains appetite and growth
vitamin_B12
a B vitamin that is used to treat pernicious anemia
vitamin_B12: a B vitamin that is used to treat pernicious anemia
vitamin_B2
a B vitamin that prevents skin lesions and weight loss
vitamin_B2: a B vitamin that prevents skin lesions and weight loss
vitamin_B6
a B vitamin that is essential for metabolism of amino acids and starch
vitamin_B6: a B vitamin that is essential for metabolism of amino acids and starch
vitamin_Bc
a B vitamin that is essential for cell growth and reproduction
vitamin_Bc: a B vitamin that is essential for cell growth and reproduction
niacin
a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract
niacin: a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract
vitamin_D
a fat-soluble vitamin that prevents rickets
vitamin_D: a fat-soluble vitamin that prevents rickets
vitamin_E
a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
vitamin_E: a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
biotin
a B vitamin that aids in body growth
biotin: a B vitamin that aids in body growth
vitamin_K
a fat-soluble vitamin that helps in the clotting of blood
vitamin_K: a fat-soluble vitamin that helps in the clotting of blood
vitamin_K1
a form of vitamin K
vitamin_K1: a form of vitamin K
vitamin_K3
a form of vitamin K
vitamin_K3: a form of vitamin K
vitamin_P
a vitamin that maintains the resistance of cell and capillary walls to permeation
vitamin_P: a vitamin that maintains the resistance of cell and capillary walls to permeation
vitamin_C
a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy
vitamin_C: a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy
vitriol
(H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry
vitriol: (H2SO4) a highly corrosive acid made from sulfur dioxide; widely used in the chemical industry
volatile
a volatile substance; a substance that changes readily from solid or liquid to a vapor
volatile: a volatile substance; a substance that changes readily from solid or liquid to a vapor
wallpaper
a decorative paper for the walls of rooms
wallpaper: a decorative paper for the walls of rooms
waste_paper
paper discarded after use
waste_paper: paper discarded after use
water_of_crystallization
the water present in hydrated compounds
water_of_crystallization: the water present in hydrated compounds
wax
any of various substances of either mineral origin or plant or animal origin; they are solid at normal temperatures and insoluble in water
wax: any of various substances of either mineral origin or plant or animal origin; they are solid at normal temperatures and insoluble in water
beeswax
a yellow to brown wax secreted by honeybees to build honeycombs
beeswax: a yellow to brown wax secreted by honeybees to build honeycombs
Ghedda_wax
wax from Indian and African bees
Ghedda_wax: wax from Indian and African bees
cerumen
a soft yellow wax secreted by glands in the ear canal
cerumen: a soft yellow wax secreted by glands in the ear canal
paraffin
from crude petroleum; used for candles and for preservative or waterproof coatings
paraffin: from crude petroleum; used for candles and for preservative or waterproof coatings
spermaceti
a white waxy substance from oil of the sperm whale
spermaceti: a white waxy substance from oil of the sperm whale
vegetable_wax
a waxy substance obtained from plants (especially from the trunks of certain palms)
vegetable_wax: a waxy substance obtained from plants (especially from the trunks of certain palms)
shellac_wax
a hard wax separated from shellac by its insolubility in alcohol
shellac_wax: a hard wax separated from shellac by its insolubility in alcohol
cadaverine
a colorless toxic ptomaine with an unpleasant odor formed during the putrefaction of animal tissue
cadaverine: a colorless toxic ptomaine with an unpleasant odor formed during the putrefaction of animal tissue
cadmium_sulfide
a yellow sulfide used chiefly as a pigment
cadmium_sulfide: a yellow sulfide used chiefly as a pigment
cadmium_yellow
pigment of cadmium sulfide and barium sulfate varying in hue from lemon yellow to orange
cadmium_yellow: pigment of cadmium sulfide and barium sulfate varying in hue from lemon yellow to orange
cadmium_yellow_pale
pale-hued cadmium yellow pigment
cadmium_yellow_pale: pale-hued cadmium yellow pigment
cadmium_orange
orange-hued cadmium yellow pigment
cadmium_orange: orange-hued cadmium yellow pigment
zinc_cadmium_sulfide
cadmium sulfide containing zinc
zinc_cadmium_sulfide: cadmium sulfide containing zinc
verdigris
a blue or green powder used as a paint pigment
verdigris: a blue or green powder used as a paint pigment
wax_paper
paper that has been waterproofed by treatment with wax or paraffin
wax_paper: paper that has been waterproofed by treatment with wax or paraffin
wetting_agent
a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved
wetting_agent: a chemical agent capable of reducing the surface tension of a liquid in which it is dissolved
detergent
a surface-active chemical widely used in industry and laundering
detergent: a surface-active chemical widely used in industry and laundering
builder
a substance added to soaps or detergents to increase their cleansing action
builder: a substance added to soaps or detergents to increase their cleansing action
whale_oil
a white to brown oil obtained from whale blubber; formerly used as an illuminant
whale_oil: a white to brown oil obtained from whale blubber; formerly used as an illuminant