| Words | Parts of Speech | Meaning/Definition/Similar Words |
|---|---|---|
| hyalonema | noun | A genus of hexactinelline sponges, having a long stem composed of very long, slender, transparent, siliceous fibres twisted together like the strands of a color. The stem of the Japanese species (H. Sieboldii), called glass-rope, has long been in use as an ornament. See Glass-rope. |
| hyalotype | noun | A photographic picture copied from the negative on glass; a photographic transparency. |
| hybernate | Alt. of Hybernation | |
| hybridism | noun | The state or quality of being hybrid. |
| hybridist | noun | One who hybridizes. |
| hybridity | noun | Hybridism. |
| hybridize | verb t. | To render hybrid; to produce by mixture of stocks. |
| hybridous | adjective | Same as Hybrid. |
| hydantoic | adjective | Pertaining to, or derived from, hydantoin. See Glycoluric. |
| hydantoin | noun | A derivative of urea, C3H4N2O2, obtained from allantion, as a white, crystalline substance, with a sweetish taste; — called also glycolyl urea. |
| hydraemia | noun | An abnormally watery state of the blood; anaemia. |
| hydramide | noun | One of a group of crystalline bodies produced by the action of ammonia on certain aldehydes. |
| hydramine | noun | One of a series of artificial, organic bases, usually produced as thick viscous liquids by the action of ammonia on ethylene oxide. They have the properties both of alcohol and amines. |
| hydrangea | noun | A genus of shrubby plants bearing opposite leaves and large heads of showy flowers, white, or of various colors. H. hortensis, the common garden species, is a native of China or Japan. |
| hydrating | present participle & vb. noun | of Hydrate |
| hydration | noun | The act of becoming, or state of being, a hydrate. |
| hydraulic | adjective | Of or pertaining to hydraulics, or to fluids in motion; conveying, or acting by, water; as, an hydraulic clock, crane, or dock. |
| hydrazine | noun | Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc. |
| hydriform | adjective | Having the form or structure of a hydra. |
| hydriodic | adjective | Pertaining to, or derived from, hydrogen and iodine; — said of an acid produced by the combination of these elements. |
| hydrocele | noun | A collection of serous fluid in the areolar texture of the scrotum or in the coverings, especially in the serous sac, investing the testicle or the spermatic cord; dropsy of the testicle. |
| hydrogode | noun | The negative pole or cathode. |
| hydroidea | noun pl. | An extensive order of Hydrozoa or Acalephae. |
| hydrology | noun | The science of water, its properties, phenomena, and distribution over the earth’s surface. |
| hydromica | noun | A variety of potash mica containing water. It is less elastic than ordinary muscovite. |
| hydropath | noun | A hydropathist. |
| hydrophid | noun | Any sea snake of the genus Hydrophys and allied genera. These snakes are venomous, live upon fishes, and have a flattened tail for swimming. |
| hydropult | noun | A machine for throwing water by hand power, as a garden engine, a fire extinguisher, etc. |
| hydrosalt | noun | A salt supposed to be formed by a hydracid and a base., An acid salt., A hydrous salt; a salt combined with water of hydration or crystallization. |
| hydrosome | noun | Alt. of Hydrosoma |
| hydrosoma | noun | All the zooids of a hydroid colony collectively, including the nutritive and reproductive zooids, and often other kinds. |
| hydrostat | noun | A contrivance or apparatus to prevent the explosion of steam boilers. |
| hydroxide | noun | A hydrate; a substance containing hydrogen and oxygen, made by combining water with an oxide, and yielding water by elimination. The hydroxides are regarded as compounds of hydroxyl, united usually with basic element or radical; as, calcium hydroxide ethyl hydroxide. |
| hydrozoal | adjective | Of or pertaining to the Hydrozoa. |
| hydrozoon | noun | One of the Hydrozoa. |
| hyemation | noun | The passing of a winter in a particular place; a wintering., The act of affording shelter in winter. |
| hygienics | noun | The science of health; hygiene. |
| hygienism | noun | Hygiene. |
| hygienist | noun | One versed in hygiene. |
| hygiology | noun | A treatise on, or the science of, the preservation of health. |
| hygrodeik | noun | A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc. |
| hygrology | noun | The science which treats of the fluids of the body. |
| hyleosaur | noun | Same as Hylaeosaur. |
| hylozoism | noun | The doctrine that matter possesses a species of life and sensation, or that matter and life are inseparable. |
| hylozoist | noun | A believer in hylozoism. |
| hymeniums | plural | of Hymenium |
| hymnology | noun | 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 knowledge of hymns; a treatise on hymns. |
| hyndreste | adjective | See Hinderest. |
| hyomental | adjective | Between the hyoid bone and the lower jaw, pertaining to them; suprahyoid; submaxillary; as, the hyomental region of the front of the neck. |
| hyostylic | adjective | 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. |
| hypethral | adjective | Exposed to the air; wanting a roof; — applied to a building or part of a building. |
| hypallage | noun | A figure consisting of a transference of attributes from their proper subjects to other. 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. |
| hypanthia | plural | of Hypanthium |
| hypaspist | noun | A shield-bearer or armor-bearer. |
| hyperbola | noun | A curve formed by a section of a cone, when the cutting plane makes a greater angle with the base than the side of the cone makes. It is a plane curve such that the difference of the distances from any point of it to two fixed points, called foci, is equal to a given distance. See Focus. If the cutting plane be produced so as to cut the opposite cone, another curve will be formed, which is also an hyperbola. Both curves are regarded as branches of the same hyperbola. See Illust. of Conic section, and Focus. |
| hyperbole | noun | A figure of speech in which the expression is an evident exaggeration of the meaning intended to be conveyed, or by which things are represented as much greater or less, better or worse, than they really are; a statement exaggerated fancifully, through excitement, or for effect. |
| hyperduly | noun | Hyperdulia. |
| hypericum | noun | A genus of plants, generally with dotted leaves and yellow flowers; — called also St. John’s-wort. |
| hyperopia | noun | Hypermetropia. |
| hypernoea | noun | Abnormal breathing, due to slightly deficient arterialization of the blood; — in distinction from eupnoea. See Eupnoea, and Dispnoea. |
| hyphening | present participle & vb. noun | of Hyphen |
| hypinosis | noun | A diminution in the normal amount of fibrin present in the blood. |
| hypnobate | noun | A somnambulist. |
| hypnocyst | noun | A cyst in which some unicellular organisms temporarily inclose themselves, from which they emerge unchanged, after a period of drought or deficiency of food. In some instances, a process of spore formation seems to occur within such cysts. |
| hypnology | noun | A treatise on sleep; the doctrine of sleep. |
| hypnotism | noun | A form of sleep or somnambulism brought on by artificial means, in which there is an unusual suspension of some powers, and an unusual activity of others. It is induced by an action upon the nerves, through the medium of the senses, as in persons of very feeble organization, by gazing steadly at a very bright object held before the eyes, or by pressure upon certain points of the surface of the body. |
| hypnotize | verb t. | To induce hypnotism in; to place in a state of hypnotism. |
| hypoarian | adjective | Of or pertaining to a hypoarion. |
| hypoarion | noun | An oval lobe beneath each of the optic lobes in many fishes; one of the inferior lobes. |
| hypoblast | noun | The inner or lower layer of the blastoderm; — called also endoderm, entoderm, and sometimes hypoderm. See Illust. of Blastoderm, Delamination, and Ectoderm. |
| hypocaust | noun | A furnace, esp. one connected with a series of small chambers and flues of tiles or other masonry through which the heat of a fire was distributed to rooms above. This contrivance, first used in bath, was afterwards adopted in private houses. |
| hypocrisy | noun | The act or practice of a hypocrite; a feigning to be what one is not, or to feel what one does not feel; a dissimulation, or a concealment of one’s real character, disposition, or motives; especially, the assuming of false appearance of virtue or religion; a simulation of goodness. |
| hypocrite | noun | One who plays a part; especially, one who, for the purpose of winning approbation of favor, puts on a fair outside seeming; one who feigns to be other and better than he is; a false pretender to virtue or piety; one who simulates virtue or piety. |
| hypoderma | noun | A layer of tissue beneath the epidermis in plants, and performing the physiological function of strengthening the epidermal tissue. In phanerogamous plants it is developed as collenchyma., An inner cellular layer which lies beneath the chitinous cuticle of arthropods, annelids, and some other invertebrates. |
| hypogaeic | adjective | Pertaining to, or obtained from, the peanut, or earthnut (Arachis hypogaea). |
| hypogeous | adjective | Growing under ground; remaining under ground; ripening its fruit under ground. |
| hyponasty | noun | Downward convexity, or convexity of the inferior surface. |
| hypoptila | plural | of Hypoptilum |
| hyporadii | plural | of Hyporadius |
| hypostome | noun | Alt. of Hypostoma |
| hypostoma | noun | The lower lip of trilobites, crustaceans, etc. |
| hypostyle | adjective | Resting upon columns; constructed by means of columns; — especially applied to the great hall at Karnak. |
| hypotarsi | plural | of Hypotarsus |
| hypotheca | noun | An obligation by which property of a debtor was made over to his creditor in security of his debt. |
| hypsiloid | adjective | Resembling the Greek letter / in form; hyoid. |
| hyrcanian | adjective | Alt. of Hyrcan |
| hysterics | noun pl. | Hysteria. |