| FORESIGHTEDLY | • foresightedly adv. With foresight; in a foresighted manner. • FORESIGHTED adv. having foresight.
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| GEOHYDROLOGIC | • geohydrologic adj. Relating to geohydrology. • GEOHYDROLOGIC adj. relating to geohydrology.
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| HAEMODIALYSER | • haemodialyser n. Alternative form of hemodialyzer. • HAEMODIALYSER n. an artificial kidney, also HAEMODIALYZER, HEMODIALYZER.
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| HAEMODIALYZER | • haemodialyzer n. Alternative form of hemodialyzer. • HAEMODIALYZER n. an artificial kidney, also HAEMODIALYSER, HEMODIALYZER.
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| HEMODIALYZERS | • hemodialyzers n. Plural of hemodialyzer. • HEMODIALYZER n. an artificial kidney.
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| HOLIDAYMAKERS | • holidaymakers n. Plural of holidaymaker. • holiday-makers n. Plural of holiday-maker.
 • HOLIDAYMAKER n. someone on holiday.
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| HYALURONIDASE | • hyaluronidase n. (Biochemistry) Any enzyme that catalyses the hydrolysis of hyaluronic acid. • HYALURONIDASE n. a mucolytic enzyme that facilitates the spread of fluids through tissues by lowering the viscosity of hyaluronic acid.
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| HYDROCEPHALIC | • hydrocephalic adj. Hydrocephalous. • hydrocephalic n. A person who has hydrocephalus.
 • HYDROCEPHALIC adj. relating to hydrocephaly, also HYDROCEPHALOUS.
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| HYDROCHLORIDE | • hydrochloride n. (Chemistry) A compound of hydrochloric acid with an organic base such as an amine. • HYDROCHLORIDE n. a chemical complex composed of an organic base in association with hydrogen chloride.
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| HYDROELECTRIC | • hydroelectric adj. That generates electricity by converting the energy of moving water, or of steam escaping under high pressure. • hydroelectric adj. Of or relating to the electricity so produced.
 • hydro-electric adj. Alternative form of hydroelectric.
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| HYDROMETRICAL | • hydrometrical adj. Concerning or applying hydrometry. • HYDROMETRICAL adj. relating to measurement by hydrometer, also HYDROMETRIC.
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| HYDROPHILITES | • hydrophilites n. Plural of hydrophilite. • HYDROPHILITE n. native calcium chloride.
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| HYDROSULPHIDE | • hydrosulphide n. (Britain) Alternative spelling of hydrosulfide. • HYDROSULPHIDE n. a compound formed by action of hydrogen sulphide on a hydroxide.
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| HYDROSULPHITE | • hydrosulphite n. Alternative spelling of hydrosulfite. • HYDROSULPHITE n. a salt of hydrosulphurous acid; esp. the sodium salt, used as a reagent.
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| HYDROXYLAMINE | • hydroxylamine n. (Inorganic chemistry) An explosive inorganic derivative of ammonia, NH2OH, used as a reducing agent… • hydroxylamine n. (Organic chemistry) Any organic derivative of this compound.
 • HYDROXYLAMINE n. a colorless odorless nitrogenous base that resembles ammonia in its reactions.
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| HYPERBOLOIDAL | • hyperboloidal adj. Having the shape or form of a hyperboloid. • HYPERBOLOIDAL adj. of or like a hyperboloid.
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| HYPERLORDOSIS | • hyperlordosis n. (Pathology) Particularly severe lordosis. | 
| HYPERPLOIDIES | • hyperploidies n. Plural of hyperploidy. • HYPERPLOIDY n. the state of being hyperploid, in excess of but not exact multiple of diploid.
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| POLICYHOLDERS | • policyholders n. Plural of policyholder. • policy␣holders n. Plural of policy holder.
 • POLICYHOLDER n. the owner of an insurance policy.
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