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- English Word Hydroxyl Definition A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.
- English Word Hydroxylamine Definition A nitrogenous, organic base, NH2.OH, resembling ammonia, and produced by a modified reduction of nitric acid. It is usually obtained as a volatile, unstable solution in water. It acts as a strong reducing agent.
- English Word Hydrozoa Definition The Acalephae; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora.
- English Word Hydrozoa Definition of Hydrozoon
- English Word Hydrozoal Definition Of or pertaining to the Hydrozoa.
- English Word Hydrozoon Definition One of the Hydrozoa.
- English Word Hydrozoons Definition of Hydrozoon
- English Word Hydruret Definition A binary compound of hydrogen; a hydride.
- English Word Hydrus Definition A constellation of the southern hemisphere, near the south pole.
- English Word Hye Definition See Hie.
- English Word Hyemal Definition Belonging to winter; done in winter.
- English Word Hyemate Definition To pass the winter.
- English Word Hyemation Definition The passing of a winter in a particular place; a wintering.
- English Word Hyemation Definition The act of affording shelter in winter.
- English Word Hyen Definition A hyena.
- English Word Hyena Definition Any carnivorous mammal of the family Hyaenidae, of which three living species are known. They are large and strong, but cowardly. They feed chiefly on carrion, and are nocturnal in their habits.
- English Word Hyenas Definition of Hyena
- English Word Hyetal Definition Of or pertaining to rain; descriptive of the distribution of rain, or of rainy regions.
- English Word Hyetograph Definition A chart or graphic representation of the average distribution of rain over the surface of the earth.
- English Word Hyetographic Definition Of or pertaining to to hyetography.
- English Word Hyetography Definition The branch of physical science which treats of the geographical distribution of rain.
- English Word Hygeia Definition The goddess of health, daughter of Esculapius.
- English Word Hygeian Definition Relating to Hygeia, the goddess of health; of or pertaining to health, or its preservation.
- English Word Hygeist Definition One skilled in hygiena; a hygienist.
- English Word Hygieist Definition A hygienist.
- English Word Hygiene Definition That department of sanitary science which treats of the preservation of health, esp. of households and communities; a system of principles or rules designated for the promotion of health.
- English Word Hygienic Definition Of or pertaining to health or hygiene; sanitary.
- English Word Hygienics Definition The science of health; hygiene.
- English Word Hygienism Definition Hygiene.
- English Word Hygienist Definition One versed in hygiene.