a translucent crystalline compound found in sugar cane and sugar beets and unripe grapes
hemoprotein
Noun
a conjugated protein linked to a compound of iron and porphyrin
haemoprotein
Noun
a conjugated protein linked to a compound of iron and porphyrin
hyalin
Noun
a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions
hyaluronic acid
Noun
a viscous mucopolysaccharide found in the connective tissue space and the synovial fluid of movable joints and the humors of the eye
hydrate
Noun
any compound that contains water of crystallization
hydrate
Verb
cause to be hydrated
hydrate
Verb
become hydrated and combine with water
hydrate
Verb
supply water or liquid to in order to maintain a healthy balance
hydrazine
Noun
a colorless fuming corrosive liquid
hydride
Noun
any binary compound formed by the union of hydrogen and other elements
hydrocarbon
Noun
an organic compound containing only carbon and hydrogen
hydrochloric acid
Noun
an aqueous solution of hydrogen chloride
hydrofluorocarbon
Noun
a fluorocarbon emitted as a by-product of industrial manufacturing
hydrogen bromide
Noun
a colorless gas that yields hydrobromic acid in solution with water
hydrogen chloride
Noun
a colorless corrosive gas (HCl)
hydrogen fluoride
Noun
a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride
hydrofluoric acid
Noun
a weak poisonous liquid acid
hydrated oxide
Noun
a compound of an oxide with water
hydrogen iodide
Noun
a colorless gas that yields hydroiodic acid in aqueous solution
hydroiodic acid
Noun
an acid formed by aqueous solution of hydrogen iodide
hydrogen sulfide
Noun
a sulfide having the unpleasant smell of rotten eggs
hyper-eutectoid steel
Noun
a steel that contains more than 0.9% carbon
hydrated lime
Noun
a caustic substance produced by heating limestone
hypnagogue
Noun
an agent that induces drowsiness or sleep
hypochlorous acid
Noun
a weak unstable acid known only in solution and in its salts
hypo-eutectoid steel
Noun
a steel that contains less that 0.9% carbon
hypoglycemic agent
Noun
any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus
hypoglycaemic agent
Noun
any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus
hydrazo group
Noun
the bivalent group -HNNH- derived from hydrazine
hydrazo radical
Noun
the bivalent group -HNNH- derived from hydrazine
hydroxide
Noun
a chemical compound containing the hydroxyl group
hydroxide
Noun
a compound of an oxide with water
hydroxyl
Noun
the monovalent group -OH in such compounds as bases and some acids and alcohols
hydroxyl group
Noun
the monovalent group -OH in such compounds as bases and some acids and alcohols
hessonite
Noun
a garnet ranging in color from yellow to brown
hydroxyl radical
Noun
the monovalent group -OH in such compounds as bases and some acids and alcohols
hydroxide ion
Noun
the anion OH having one oxygen and one hydrogen atom
hydroxyl ion
Noun
the anion OH having one oxygen and one hydrogen atom
hydroxymethyl
Noun
a methyl with hydroxide replacing the hydrogen atoms
hydroxybutyric acid
Noun
hydroxy derivative of butyric acid
halibut-liver oil
Noun
a fatty oil from halibut livers that is used as a source of vitamin A
halide
Noun
a salt of any halogen acid
hoarfrost
Noun
ice crystals forming a white deposit (especially on objects outside)
halocarbon
Noun
one of various compounds of carbon and any of the halogens
hailstone
Noun
small pellet of ice that falls during a hailstorm
halogen
Noun
any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
hanging chad
Noun
a chad that is incompletely removed and hanging by one corner
hard lead
Noun
unrefined lead that is hard because of the impurities it contains