Hygienist noun One versed in hygiene.

Hygiology noun [ Greek ... health + -logy .] A treatise on, or the science of, the preservation of health. [ R.]

Hygrine noun [ From Greek ... moist.] (Chemistry) An alkaloid associated with cocaine in coca leaves ( Erythroxylon coca ), and extracted as a thick, yellow oil, having a pungent taste and odor.

Hygrodeik noun [ Greek ... wet, moist, and ... to show.] (Physics) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc.

Hygrograph noun [ Greek ... wet + -graph .] (Physics) An instrument for recording automatically the variations of the humidity of the atmosphere.

Hygrology noun [ Greek ... wet + -logy : confer French hygrologie .] (Medicine) The science which treats of the fluids of the body.

Hygrometer noun [ Greek ... wet, moist + -meter : confer French hygromètre .] (Physics) An instrument for measuring the degree of moisture of the atmosphere.

Daniell's hygrometer , a form of hygrometer consisting of a bent glass tube terminating in two bulbs, the one covered with muslin, the other of black glass, and containing ether and a thermometer. Ether being poured on the muslin, the black ball, cooled by the evaporation of the ether within, is soon covered with dew; at this moment, the inclosed thermometer gives the dew-point, and this, compared with the reading of one in the air, determines the humidity.

Hygrometric, Hygrometrical adjective [ Confer French hygrométrique .]
1. Of or pertaining to hygrometry; made with, or according to, the hygrometer; as, hygrometric observations.

2. Readily absorbing and retaining moisture; as, hygrometric substances, like potash.

Hygrometry noun [ Confer French hygrométrie .] (Physics) 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.

Hygrophanous adjective [ Greek ... wet + ... to show.] Having such a structure as to be diaphanous when moist, and opaque when dry.

Hygrophthalmic adjective [ Greek ... wet + English ophthalmic .] (Anat.) Serving to moisten the eye; -- sometimes applied to the lachrymal ducts.

Hygroplasm noun [ Greek ... wet + ... form, mold.] (Biol.) 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.

Hygroscope noun [ Greek ... wet + -scope : confer French hygroscope .] (Physics) An instrument which shows whether there is more or less moisture in the atmosphere, without indicating its amount.

Hygroscopic adjective [ Confer French hygroscopique .]
1. 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.

2. Having the property of readily inbibing moisture from the atmosphere, or of the becoming coated with a thin film of moisture, as glass, etc.

Hygroscopicity noun (Botany) The property possessed by vegetable tissues of absorbing or discharging moisture according to circumstances.

Hygrostatics noun [ Greek ... wet + .... See Statics .] The science or art of comparing or measuring degrees of moisture. Evelyn.

Hyke noun See Haik , and Huke .

Hyksos noun [ Greek ..., from Egypt. hikshasu chiefs of the Bedouins, shepherds.] 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.

Hylarchical adjective [ Greek ... wood, matter + ...: confer French hylarchique . See Archical .] Presiding over matter. [ Obsolete] Hallywell.

Hyleosaur noun Same as Hylæosaur .

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

Hylicist noun [ Greek ... adj., material, from ... wood, matter.] A philosopher who treats chiefly of matter; one who adopts or teaches hylism.

Hylism noun [ Greek ... wood, matter.] (Metaph.) A theory which regards matter as the original principle of evil.

Hylobate noun [ Greek ... one that walks or inhabits the woods: ... a wood + ... to go.] (Zoology) Any species of the genus Hylobates ; a gibbon, or long-armed ape. See Gibbon .

Hylodes noun [ New Latin , from Greek ... woody, wooded, muddy; ... a wood + ... form.] (Zoology) 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.

Hyloism noun Same as Hylotheism .

Hyloist noun [ Greek ... wood, matter.] Same as Hylotheist .

Hylopathism noun [ Greek ... matter + ..., ..., to suffer.] The doctrine that matter is sentient. Krauth-Fleming.

Hylopathist noun One who believes in hylopathism.

Hylophagous adjective [ Greek ... wood + ... to eat.] (Zoology) Eating green shoots, as certain insects do.

Hylotheism noun [ Greek ... wood, matter + ... God.] The doctrine of belief that matter is God, or that there is no God except matter and the universe; pantheism. See Materialism .

Hylotheist noun One who believes in hylotheism.

Hylozoic adjective Of or pertaining to hylozoism.

Hylozoism noun [ Greek ... wood, matter + ... life, from ... to live: confer French hylozoïsme .] The doctrine that matter possesses a species of life and sensation, or that matter and life are inseparable. [ R.] Cudworth.

Hylozoist noun A believer in hylozoism. A. Tucker.

Hylæosaur Hy`læ*o*sau"rus noun [ New Latin hylaeosaurus , from Greek ... belonging to a forest (fr. ... wood) + ... a lizard.] (Paleon.) 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.

Hymar noun (Zoology) The wild ass of Persia.

Hymen noun [ Greek ... skin, membrane.] (Anat.) A fold of muscous membrane often found at the orifice of the vagina; the vaginal membrane.

Hymen noun [ Latin , from Greek ....]
1. (Class Myth.) 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.

Till Hymen brought his love-delighted hour,
There dwelt no joy in Eden's rosy bower.

Campbell.

2. Marriage; union as if by marriage.

Hymen of element and race.

Emerson.

Hymeneal, Hymenean adjective [ Latin hymeneius , adjective , also Hymenaeus , noun , Hymen, Greek ... the wedding song, also ... Hymen: confer French hyménéal , hyménéen .] Of or pertaining to marriage; as, hymeneal rites. Pope.

Hymeneal, Hymenean noun A marriage song. Milton.

Hymenium noun ; plural Latin Hymenia , English Hymeniums . [ New Latin , from Greek ... a membrane.] (Botany) The spore-bearing surface of certain fungi, as that on the gills of a mushroom.

Hymenogeny noun [ Greek ... a membrane + root of ... to be born.] 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.

Hymenomycetes noun plural [ New Latin , from Greek ... a membrane + ..., ..., a mushroom.] (Botany) One of the great divisions of fungi, containing those species in which the hymenium is completely exposed. M. J. Berkley.

Hymenophore noun [ Greek ... a membrane + ... to bear.] (Botany) That part of a fungus which is covered with the hymenium.

Hymenopter noun [ Confer French hyménoptère .] (Zoology) One of the Hymenoptera.

Hymenoptera noun plural [ New Latin , from Greek ... membrane-winged; ... skin, membrane + ... wing.] (Zoology) An extensive order of insects, including the bees, ants, ichneumons, sawflies, etc.

» They have four membranous wings, with few reticulations, and usually with a thickened, dark spot on the front edge of the anterior wings. In most of the species, the tongue, or lingua, is converted into an organ for sucking honey, or other liquid food, and the mandibles are adapted for biting or cutting. In one large division (Aculeata), including the bees, wasps, and ants, the females and workers usually have a sting, which is only a modified ovipositor.

Hymenopteral, Hymenopterous adjective (Zoology) Like, or characteristic of, the Hymenoptera; pertaining to the Hymenoptera.

Hymenopteran noun (Zoology) One of the Hymenoptera.