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.

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.

a methyl radical with a hydroxyl group replacing one of the hydrogen atoms.

A crystalline amino acid (C5H9NO3), a hydroxylated proline, obtained by hydrolysis of gelatin or collagen. Chemically it is 4-hydroxy-L-proline. It is classified as nonessential for growth in rats.

The Acaleph/; one of the classes of c/lenterates, including the Hydroidea, Discophora, and Siphonophora.

Of or pertaining to the Hydrozoa.

One of the Hydrozoa.

A binary compound of hydrogen; a hydride.

A constellation of the southern hemisphere, near the south pole.

See Hie.

Belonging to winter; done in winter.

To pass the winter.

The passing of a winter in a particular place; a wintering.

A hyena.

Any carnivorous mammal of the family Hy/nid/, doglike nocturnal mammals of Africa and southern Asia, 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.

Of or pertaining to rain; descriptive of the distribution of rain, or of rainy regions.

A chart or graphic representation of the average distribution of rain over the surface of the earth.

Of or pertaining to to hyetography.

The branch of physical science which treats of the geographical distribution of rain.

The science which treats of the precipitation of rain, snow, etc.

The goddess of health, daughter of Esculapius.

Relating to Hygeia, the goddess of health; of or pertaining to health, or its preservation.

One skilled in hygiena; a hygienist.

A hygienist.

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.

Of or pertaining to health or hygiene; sanitary.

The science of health; hygiene.

Hygiene.

One versed in hygiene.

A treatise on, or the science of, the preservation of health.

An alkaloid associated with cocaine in coca leaves (Erythroxylon coca), and extracted as a thick, yellow oil, having a pungent taste and odor.

A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

An instrument for recording automatically the variations of the humidity of the atmosphere.

The science which treats of the fluids of the body.

An instrument for measuring the degree of moisture of the atmosphere.

Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations.

That branch of physics which relates to the determination of the humidity of bodies, particularly of the atmosphere, with the theory and use of the instruments constructed for this purpose.

Having such a structure as to be diaphanous when moist, and opaque when dry.

Serving to moisten the eye; -- sometimes applied to the lachrymal ducts.

The fluid portion of the cell protoplasm, in opposition to stereoplasm, the solid or insoluble portion. The latter is supposed to be partly nutritive and partly composed of idioplasm.

An instrument which shows whether there is more or less moisture in the atmosphere, without indicating its amount.

Of or pertaining to, or indicated by, the hygroscope; not readily manifest to the senses, but capable of detection by the hygroscope; as, glass is often covered with a film of hygroscopic moisture.

The property possessed by vegetable tissues of absorbing or discharging moisture according to circumstances.

The science or art of comparing or measuring degrees of moisture.

See Haik, and Huke.

A dynasty of Egyptian kings, often called the Shepherd kings, of foreign origin, who, according to the narrative of Manetho, ruled for about 500 years, forming the XVth and XVIth dynasties. It is now considered that the XVIth is merely a double of the XVth dynasty, and that the total period of the six Hyksos kings was little more than 100 years. It is supposed that they were Asiatic Semites.

A large Wealden dinosaur from the Tilgate Forest, England. It was about twenty feet long, protected by bony plates in the skin, and armed with spines.

Presiding over matter.

Same as Hyl/osaur.

Of or pertaining to matter; material; corporeal; as, hylic influences.

A philosopher who treats chiefly of matter; one who adopts or teaches hylism.

A theory which regards matter as the original principle of evil.

Any species of the genus Hylobates; a gibbon, or long-armed ape. See Gibbon.

The piping frog (Hyla Pickeringii), a small American tree frog, which in early spring, while breeding in swamps and ditches, sings with high, shrill, but musical, notes.

Same as Hylotheism.

Same as Hylotheist.

The doctrine that matter is sentient.

One who believes in hylopathism.

Eating green shoots, as certain insects do.

The doctrine of belief that matter is God, or that there is no God except matter and the universe; pantheism. See Materialism.

Of or pertaining to hylozoism.

The doctrine that matter possesses a species of life and sensation, or that matter and life are inseparable.

A believer in hylozoism.

The wild ass of Persia.

A fabulous deity; according to some, the son of Apollo and Urania, according to others, of Bacchus and Venus. He was the god of marriage, and presided over nuptial solemnities.

Same as hymeneal.

A marriage song.

The spore-bearing surface of certain fungi, as that on the gills of a mushroom.

An order of fungi sometimes placed in subclass Homobasidiomycetes.

The production of artificial membranes by contact of two fluids, as albumin and fat, by which the globules of the latter are surrounded by a thin film of the former.

One of the great divisions of fungi, containing those species in which the hymenium is completely exposed.

That part of a fungus which is covered with the hymenium.

One of the Hymenoptera.

An extensive order of insects, including the bees, ants, ichneumons, sawflies, etc.

One of the Hymenoptera.

Same as hymenopteran.

Like, or characteristic of, the Hymenoptera; pertaining to the Hymenoptera.

To sing in praise or adoration.

A collection of hymns; a hymn book.

Relating to hymns, or sacred lyrics.

The singing of hymns.

A writer of hymns.

Hymns, considered collectively; hymnology.

One who writes on the subject of hymns.

The art or act of composing hymns.

A composer or compiler of hymns; one versed in hymnology.

The hymns or sacred lyrics composed by authors of a particular country or period; as, the hymnology of the eighteenth century; also, the collective body of hymns used by any particular church or religious body; as, the Anglican hymnology.

A hymn.

See Hinderest.

A servant. See Hine.

A division of ganoid fishes, including the gar pikes and bowfins.

Pertaining to or connecting the tongue and hyodean arch; as, the hyoglossal membrane. Of or pertaining to the hyoglossus muscle.

A flat muscle on either side of the tongue, connecting it with the hyoid bone.

The hyoid bone.

Same as Hyoid, a.

Pertaining both to the hyoidean arch and the mandible or lower jaw; as, the hyomandibular bone or cartilage, a segment of the hyoid arch which connects the lower jaw with the skull in fishes. The hyomandibular bone or cartilage.

Between the hyoid bone and the lower jaw, pertaining to them; suprahyoid; submaxillary; as, the hyomental region of the front of the neck.

The second lateral plate in the plastron of turtles; -- called also hyosternum.

An alkaloid found with hyoscyamine (with which it is also isomeric) in henbane, and extracted as a white, amorphous, semisolid substance.

An alkaloid found in henbane (Hyoscyamus niger), and regarded as its active principle. It is also found with other alkaloids in the thorn apple and deadly nightshade. It is extracted as a white crystalline substance, with a sharp, offensive taste. Hyoscyamine is isomeric with atropine, is very poisonous, and is used as a medicine for neuralgia, like belladonna. Called also hyoscyamia, duboisine, etc.

A genus of poisonous plants of the Nightshade family; henbane.

Between the hyoid bone and the sternum, or pertaining to them; infrahyoid; as, the hyosternal region of the neck. Pertaining to the hyosternum of turtles.

See Hyoplastron.

Having the mandible suspended by the hyomandibular, or upper part of the hyoid arch, as in fishes, instead of directly articulated with the skull as in mammals; -- said of the skull.

To make melancholy.

A figure consisting of a transference of attributes from their proper subjects to others. Thus Virgil says, /dare classibus austros,/ to give the winds to the fleets, instead of dare classibus austris, to give the fleets to the winds.

See Allelomorph.

A fruit consisting in large part of a receptacle, enlarged below the calyx, as in the Calycanthus, the rose hip, and the pear.

A process, or other element, of a vertebra developed from the ventral side of the centrum, as h/mal spines, and chevron bones.

Situated below an artery; applied esp. to the branches of the bronchi given off below the point where the pulmonary artery crosses the bronchus.

A shield-bearer or armor-bearer.

Beneath the axis of the skeleton; subvertebral; hyposkeletal.

A throw in which the wrestler lifts his opponent from the ground, swings him to one side, knocks up his nearer thigh from the back with the knee, and throws him on his back.

Exhibiting hyperactivity.

An unusually high level of activity; -- used especially with respect to children who move around frequently and do not sit still very long, most noticeably in school. It is sometimes associated with attention deficit disorder.

A superabundance or congestion of blood in an organ or part of the body.

A state of exalted or morbidly increased sensibility of the body, or of a part of it.

A lateral and backward-projecting process on the dorsal side of a vertebra.

One who holds a shield over another; hence, a defender.

Of, pertaining to, or using a pressure that is greater than normal atmospheric pressure; as, a hyperbaric chamber, where divers may decompress slowly to avoid the bends.