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Halometer :: Halometer (n.) An instrument for measuring the forms and angles of salts and crystals; a goniometer.

Picene :: Picene (n.) A hydrocarbon (C/H/) extracted from the pitchy residue of coal tar and petroleum as a bluish fluorescent crystalline substance.

Phloroglucin :: Phloroglucin (n.) A sweet white crystalline substance, metameric with pyrogallol, and obtained by the decomposition of phloretin, and from certain gums, as catechu, kino, etc. It belongs to the class of phenols. [Called also phloroglucinol.].

Strychnia :: Struvite (n.) A crystalline mineral found in guano. It is a hydrous phosphate of magnesia and ammonia.

Cantharidin :: Cantharidin (n.) The active principle of the cantharis, or Spanish fly, a volatile, acrid, bitter solid, crystallizing in four-sided prisms..

Chill :: Chill (v. t.) To produce, by sudden cooling, a change of crystallization at or near the surface of, so as to increase the hardness; said of cast iron..

Halo :: Halo (n.) A luminous circle, usually prismatically colored, round the sun or moon, and supposed to be caused by the refraction of light through crystals of ice in the atmosphere. Connected with halos there are often white bands, crosses, or arches, resulting from the same atmospheric conditions..

Fraxin :: Fraxin (n.) A colorless crystalline substance, regarded as a glucoside, and found in the bark of the ash (Fraxinus) and along with esculin in the bark of the horse-chestnut. It shows a delicate fluorescence in alkaline solutions; -- called also paviin..

Syenitic :: Syenite (n.) A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (elaeolite) or leucite, and is then called nephelite (elaeolite) syenite or leucite syenite..

Sodamide :: Sodamide (n.) A greenish or reddish crystalline substance, NaNH2, obtained by passing ammonia over heated sodium..

Fahlband :: Fahlband (n.) A stratum in crystalline rock, containing metallic sulphides..

Thinolite :: Thinolite (n.) A calcareous tufa, in part crystalline, occurring on a large scale as a shore deposit about the Quaternary lake basins of Nevada..

Haematexylin :: Haematexylin (n.) The coloring principle of logwood. It is obtained as a yellow crystalline substance, C16H14O6, with a sweetish taste. Formerly called also hematin..

Clinodiagonal :: Clinodiagonal (n.) That diagonal or lateral axis in a monoclinic crystal which makes an oblique angle with the vertical axis. See Crystallization.

Colloid :: Colloid (n.) A substance (as albumin, gum, gelatin, etc.) which is of a gelatinous rather than a crystalline nature, and which diffuses itself through animal membranes or vegetable parchment more slowly than crystalloids do; -- opposed to crystalloid..

Celestite :: Celestite (n.) Native strontium sulphate, a mineral so named from its occasional delicate blue color. It occurs crystallized, also in compact massive and fibrous forms..

Pseudo-cone :: Pseudo-cone (n.) One of the soft gelatinous cones found in the compound eyes of certain insects, taking the place of the crystalline cones of others..

Sinapoline :: Sinapoline (n.) A nitrogenous base, CO.(NH.C3H5)2, related to urea, extracted from mustard oil, and also produced artifically, as a white crystalline substance; -- called also diallyl urea..

Sulphantimonate :: Sulphanilic (a.) Of, pertaining to, or designating, an anilene sulphonic acid which is obtained as a white crystalline substance..

Hemoglobin :: Hemoglobin (n.) The normal coloring matter of the red blood corpuscles of vertebrate animals. It is composed of hematin and globulin, and is also called haematoglobulin. In arterial blood, it is always combined with oxygen, and is then called oxyhemoglobin. It crystallizes under different forms from different animals, and when crystallized, is called haematocrystallin. See Blood crystal, under Blood..

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