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An oxide of holmium.

nic bases, usually produced as thick viscous liquids by the action of ammonia on ethylene oxide. They have the properties both of alcohol and amines.

ged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime.

Pertaining to, or containing, hydrogen; as, hydric oxide. Hydric dioxide. (Chem.) See Hydrogen dioxide, under Hydrogen. -- Hydric oxide (Chem.), water. -- Hydric sulphate (Chem.), hydrogen sulphate or sulphuric acid.

A prefix equivalent to super- or per-; as hyperoxide, or peroxide. [Obs.] See Per-.

Combined with a relatively large amount of oxygen; -- said of higher oxides. [Obs.]

ulphuric acid. Hyposulphuric acid, an acid, H2S2O6, obtained by the action of manganese dioxide on sulphur dioxide, and known only in a watery solution and in its salts; -- called also dithionic acid. See Dithionic.

to denote: (a) The nonmetallic, or negative, element or radical in a binary compound; as, oxide, sulphide, chloride. (b) A compound which is an anhydride; as, glycolide, phthalide. (c) Any one of a series of derivatives; as, indogenide, glucoside, etc.

ove its critical point; -- also particularly of oxygen, hydrogen, nitrogen, and carbon monoxide, formerly regarded as incapable of liquefaction at any temperature or pressure.

or consumed by fire; uninflammable; as, asbestus is an incombustible substance; carbon dioxide is an incombustible gas. Incombustible cloth, a tissue of amianthus or asbestus; also, a fabric imbued with an incombustible substance. -- In`com*bus"ti*ble*ness, n. -- In`com*bus"ti*bly, adv.

useful metallic element, being of almost universal occurrence, usually in the form of an oxide (as hematite, magnetite, etc.), or a hydrous oxide (as limonite, turgite, etc.). It is reduced on an enormous scale in three principal forms; viz., cast iron, steel, and wrought iron. Iron usually appears dark brown, from ox…

, HO.C2H4.SO3H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.

wnish black color, related to titanite in form. It consists chiefly of silica, titanium dioxide, lime, and yttria.

antimony; -- so called on account of its red color. (b) (Med. Chem.) A compound of the trioxide and trisulphide of antimony, used in medicine. This substance occurs in nature as the mineral kermesite.

(P. vulgaris). See under Bean. -- Kidney ore (Min.), a variety of hematite or iron sesquioxide, occurring in compact kidney-shaped masses. -- Kidney stone. (Min.) See Nephrite, and Jade. -- Kidney vetch (Bot.), a leguminous herb of Europe and Asia (Anthyllis vulneraria), with cloverlike heads of red or yellow flower…

for washing pig iron, differing from the Bell process in using manganese as well as iron oxide, and performed in a Pernot furnace. Called also the Bell-Krupp process.

gment formed by combining some coloring matter, usually by precipitation, with a metallic oxide or earth, esp. with aluminium hydrate; as, madder lake; Florentine lake; yellow lake, etc.

d from its notes, which resemble a shrill laughing. -- Laughing gas (Chem.), hyponitrous oxide, or protoxide of nitrogen; -- so called from the exhilaration and laughing which it sometimes produces when inhaled. It is much used as an anæsthetic agent. -- Laughing goose (Zoöl.), the European white-fronted goose. -- L…

aden polishing wheel, used by lapidaries. -- Lead ocher (Min.), a massive sulphur-yellow oxide of lead. Same as Massicot. -- Lead pencil, a pencil of which the marking material is graphite (black lead). -- Lead plant (Bot.), a low leguminous plant, genus Amorpha (A. canescens), found in the Northwestern United State…

Oxide of calcium; the white or gray, caustic substance, usually called quicklime, obtained by calcining limestone or shells, the heat driving off carbon dioxide and leaving lime. It develops great heat when treated with water, forming slacked lime, and is an essential ingredient of cement, plastering, mortar, etc.CaO…