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sunstone
a translucent quartz spangled with bits of mica or other minerals
sunstone: a translucent quartz spangled with bits of mica or other minerals
superoxide
the univalent anion O2-
superoxide: the univalent anion O2-
superoxide
a metallic oxide containing the univalent anion O2-
superoxide: a metallic oxide containing the univalent anion O2-
superoxide_dismutase
an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen
superoxide_dismutase: an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen
surgical_spirit
methylated spirit used in the practice of medicine (especially for cleansing the skin before injections or before surgery)
surgical_spirit: methylated spirit used in the practice of medicine (especially for cleansing the skin before injections or before surgery)
Swedish_iron
wrought iron of high purity made in Sweden
Swedish_iron: wrought iron of high purity made in Sweden
swinging_chad
a chad that is incompletely removed and still attached at two corners
swinging_chad: a chad that is incompletely removed and still attached at two corners
sylvanite
a silver-white mineral consisting of silver gold telluride; a source of gold in Australia and America
sylvanite: a silver-white mineral consisting of silver gold telluride; a source of gold in Australia and America
sylvite
a mineral consisting of native potassium chloride; an important ore of potassium that is found in sedimentary beds
sylvite: a mineral consisting of native potassium chloride; an important ore of potassium that is found in sedimentary beds
tabun
the first known nerve agent, synthesized by German chemists in 1936; a highly toxic combustible liquid that is soluble in organic solvents and is used as a nerve gas in chemical warfare
tabun: the first known nerve agent, synthesized by German chemists in 1936; a highly toxic combustible liquid that is soluble in organic solvents and is used as a nerve gas in chemical warfare
talc
a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
talc: a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
French_chalk
a soft white compact talc used to mark cloth or to remove grease stains
French_chalk: a soft white compact talc used to mark cloth or to remove grease stains
rensselaerite
a kind of soft talc; sometimes used as wood filler
rensselaerite: a kind of soft talc; sometimes used as wood filler
tallow_oil
an animal oil obtained by pressing tallow; used as a lubricant
tallow_oil: an animal oil obtained by pressing tallow; used as a lubricant
tannin
any of various complex phenolic substances of plant origin; used in tanning and in medicine
tannin: any of various complex phenolic substances of plant origin; used in tanning and in medicine
catechin
a tannic acid that is extracted from black catechu as a white crystalline substance
catechin: a tannic acid that is extracted from black catechu as a white crystalline substance
tantalite
a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
tantalite: a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
tartaric_acid
an acid found in many fruits; used in soft drinks and confectionery and baking powder
tartaric_acid: an acid found in many fruits; used in soft drinks and confectionery and baking powder
racemic_acid
the optically inactive form of tartaric acid that is often found in grape juice
racemic_acid: the optically inactive form of tartaric acid that is often found in grape juice
tear_gas
a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds
tear_gas: a gas that makes the eyes fill with tears but does not damage them; used in dispersing crowds
telluride
any binary compound of tellurium with other more electropositive elements
telluride: any binary compound of tellurium with other more electropositive elements
telomerase
an enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide
telomerase: an enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide
tenderizer
a substance (as the plant enzyme papain) applied to meat to make it tender
tenderizer: a substance (as the plant enzyme papain) applied to meat to make it tender
terpene
an unsaturated hydrocarbon obtained from plants
terpene: an unsaturated hydrocarbon obtained from plants
tetrachloride
any compound that contains four chlorine atoms per molecule
tetrachloride: any compound that contains four chlorine atoms per molecule
tetrafluoroethylene
a flammable gaseous fluorocarbon used in making plastics (polytetrafluoroethylene resins)
tetrafluoroethylene: a flammable gaseous fluorocarbon used in making plastics (polytetrafluoroethylene resins)
tetrahalide
any halide containing four halogen atoms in its molecules
tetrahalide: any halide containing four halogen atoms in its molecules
tetrasaccharide
any of a variety of carbohydrates that yield four monosaccharide molecules on complete hydrolysis
tetrasaccharide: any of a variety of carbohydrates that yield four monosaccharide molecules on complete hydrolysis
tetrodotoxin
a powerful neurotoxin found in the ovaries of pufferfish
tetrodotoxin: a powerful neurotoxin found in the ovaries of pufferfish
tetroxide
an oxide containing four atoms of oxygen in the molecule
tetroxide: an oxide containing four atoms of oxygen in the molecule
tetryl
a yellow crystalline explosive solid that is used in detonators
tetryl: a yellow crystalline explosive solid that is used in detonators
thatch
plant stalks used as roofing material
thatch: plant stalks used as roofing material
thickening
any material used to thicken
thickening: any material used to thicken
thiouracil
depresses the function of the thyroid gland
thiouracil: depresses the function of the thyroid gland
thiocyanate
a salt of thiocyanic acid; formed when alkaline cyanides are fused with sulfur
thiocyanate: a salt of thiocyanic acid; formed when alkaline cyanides are fused with sulfur
thiocyanic_acid
an unstable acid that can be obtained by distilling a thiocyanate salt
thiocyanic_acid: an unstable acid that can be obtained by distilling a thiocyanate salt
thorite
a radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite
thorite: a radioactive mineral consisting of thorium silicate; it is a source of thorium that is found in coarse granite
thortveitite
a mineral consisting of scandium yttrium silicate; a source of scandium
thortveitite: a mineral consisting of scandium yttrium silicate; a source of scandium
threonine
a colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutrition
threonine: a colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutrition
prothrombin
a protein in blood plasma that is the inactive precursor of thrombin
prothrombin: a protein in blood plasma that is the inactive precursor of thrombin
thromboplastin
an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
thromboplastin: an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
calcium_ion
ion of calcium; a factor in the clotting of blood
calcium_ion: ion of calcium; a factor in the clotting of blood
proaccelerin
a coagulation factor
proaccelerin: a coagulation factor
proconvertin
a coagulation factor formed in the kidney under the influence of vitamin K
proconvertin: a coagulation factor formed in the kidney under the influence of vitamin K
antihemophilic_factor
a coagulation factor (trade name Hemofil) whose absence is associated with hemophilia A
antihemophilic_factor: a coagulation factor (trade name Hemofil) whose absence is associated with hemophilia A
Christmas_factor
coagulation factor whose absence is associated with hemophilia B
Christmas_factor: coagulation factor whose absence is associated with hemophilia B
prothrombinase
coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors
prothrombinase: coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors
plasma_thromboplastin_antecedent
coagulation factor whose deficiency results in a hemorrhagic tendency
plasma_thromboplastin_antecedent: coagulation factor whose deficiency results in a hemorrhagic tendency
Hageman_factor
coagulation factor whose deficiency results in prolongation of clotting time of venous blood
Hageman_factor: coagulation factor whose deficiency results in prolongation of clotting time of venous blood
fibrinase
in the clotting of blood thrombin catalyzes factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot
fibrinase: in the clotting of blood thrombin catalyzes factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot
thymine
a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine
thymine: a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine
deoxyadenosine
a nucleoside component of DNA; composed of adenosine and deoxyribose
deoxyadenosine: a nucleoside component of DNA; composed of adenosine and deoxyribose
deoxycytidine
a nucleoside component of DNA; composed of cytosine and deoxyribose
deoxycytidine: a nucleoside component of DNA; composed of cytosine and deoxyribose
deoxyguanosine
a nucleoside component of DNA; composed of guanine and deoxyribose
deoxyguanosine: a nucleoside component of DNA; composed of guanine and deoxyribose
deoxythymidine
a nucleoside component of DNA; composed of thymine and deoxyribose
deoxythymidine: a nucleoside component of DNA; composed of thymine and deoxyribose
thymol
a colorless crystalline solid used in perfume or preserving biological specimens or in embalming or medically as a fungicide or antiseptic
thymol: a colorless crystalline solid used in perfume or preserving biological specimens or in embalming or medically as a fungicide or antiseptic
melanocyte-stimulating_hormone
a hormone secreted by the anterior pituitary gland that controls the degree of pigmentation in melanocytes
melanocyte-stimulating_hormone: a hormone secreted by the anterior pituitary gland that controls the degree of pigmentation in melanocytes
thyrotropin
anterior pituitary hormone that stimulates the function of the thyroid gland
thyrotropin: anterior pituitary hormone that stimulates the function of the thyroid gland
thyrotropin-releasing_hormone
hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary
thyrotropin-releasing_hormone: hormone released by the hypothalamus that controls the release of thyroid-stimulating hormone from the anterior pituitary
thyronine
a phenolic amino acid of which thyroxine is a derivative
thyronine: a phenolic amino acid of which thyroxine is a derivative
tile
a thin flat slab of fired clay used for roofing
tile: a thin flat slab of fired clay used for roofing
till
unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
till: unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
tissue
a soft thin (usually translucent) paper
tissue: a soft thin (usually translucent) paper
toilet_tissue
a soft thin absorbent paper for use in toilets
toilet_tissue: a soft thin absorbent paper for use in toilets
toilet_roll
a roll of toilet paper
toilet_roll: a roll of toilet paper
toluene
a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels
toluene: a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels
toluic_acid
an isomeric acid derived from toluene
toluic_acid: an isomeric acid derived from toluene
tombac
an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding
tombac: an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding
toner
a black or colored powder used in a printer to develop a xerographic image
toner: a black or colored powder used in a printer to develop a xerographic image
toner
a solution containing chemicals that can change the color of a photographic print
toner: a solution containing chemicals that can change the color of a photographic print
tool_steel
alloy steel that is suitable for making tools; is hard and tough and can retain a cutting edge
tool_steel: alloy steel that is suitable for making tools; is hard and tough and can retain a cutting edge
topaz
a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone
topaz: a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone
topaz
a yellow quartz
topaz: a yellow quartz
tourmaline
a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
tourmaline: a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
trace_element
an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
trace_element: an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
tracing_paper
a semitransparent paper that is used for tracing drawings
tracing_paper: a semitransparent paper that is used for tracing drawings
tragacanth
a gum used in pharmacy, adhesives, and textile printing
tragacanth: a gum used in pharmacy, adhesives, and textile printing
transaminase
a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound)
transaminase: a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound)
transferase
any of various enzymes that move a chemical group from one compound to another compound
transferase: any of various enzymes that move a chemical group from one compound to another compound
transfer_paper
a paper that is coated with a preparation for transferring a design to another surface
transfer_paper: a paper that is coated with a preparation for transferring a design to another surface
transferrin
a globulin in blood plasma that carries iron
transferrin: a globulin in blood plasma that carries iron
transparent_gem
a gemstone having the property of transmitting light without serious diffusion
transparent_gem: a gemstone having the property of transmitting light without serious diffusion
transparent_substance
a material having the property of admitting light diffusely; a partly transparent material
transparent_substance: a material having the property of admitting light diffusely; a partly transparent material
triamcinolone
a synthetic corticosteroid (trade names Aristocort or Aristopak or Kenalog) used as an anti-inflammatory agent
triamcinolone: a synthetic corticosteroid (trade names Aristocort or Aristopak or Kenalog) used as an anti-inflammatory agent
triazine
any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring
triazine: any of three isomeric compounds having three carbon and three nitrogen atoms in a six-membered ring
tri-chad
a chad that is incompletely removed and still attached at three corners
tri-chad: a chad that is incompletely removed and still attached at three corners
trichloroacetic_acid
a strong acid made by chlorinating acetic acid
trichloroacetic_acid: a strong acid made by chlorinating acetic acid
margarin
a glyceryl ester of margaric acid
margarin: a glyceryl ester of margaric acid
tridymite
a mineral form of silica
tridymite: a mineral form of silica
triolein
a naturally occurring glyceride of oleic acid that is found in fats and oils
triolein: a naturally occurring glyceride of oleic acid that is found in fats and oils
trimer
a polymer (or a molecule of a polymer) consisting of three identical monomers
trimer: a polymer (or a molecule of a polymer) consisting of three identical monomers
trioxide
an oxide containing three atoms of oxygen in the molecule
trioxide: an oxide containing three atoms of oxygen in the molecule
tripalmitin
a triglyceride of palmitic acid
tripalmitin: a triglyceride of palmitic acid
triphosphopyridine
a pyridine ring with three phosphorus groups
triphosphopyridine: a pyridine ring with three phosphorus groups
triphosphopyridine_nucleotide
a coenzyme of several enzymes
triphosphopyridine_nucleotide: a coenzyme of several enzymes
triphosphoric_acid
an acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters
triphosphoric_acid: an acid that is a partial anhydride of three molecules of phosphoric acid; known chiefly in the form of its salts and esters
trisaccharide
any of a variety of carbohydrates that yield three monosaccharide molecules on complete hydrolysis
trisaccharide: any of a variety of carbohydrates that yield three monosaccharide molecules on complete hydrolysis
trisodium_phosphate
the tertiary phosphate of sodium used as a builder in soaps and detergents
trisodium_phosphate: the tertiary phosphate of sodium used as a builder in soaps and detergents
tristearin
a triglyceride of stearic acid
tristearin: a triglyceride of stearic acid
trypsin
an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units
trypsin: an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units