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A red amorphous powder consisting of ferric oxide. It is used in polishing glass, metal, or gems, and as a cosmetic, etc. Called also crocus, jeweler's rouge, etc.

ined from, saccharine substances; specifically, designating an acid obtained, as a white amorphous gummy mass, by the oxidation of mannite, glucose, sucrose, etc.

Of, pertaining to, or designating, an acid obtained as a dark amorphous substance by the long-continued boiling of sucrose with very dilute sulphuric acid. It resembles humic acid. [Written also sacculmic.]

An amorphous huminlike substance resembling sacchulmic acid, and produced together with it.

A yellow amorphous resinoid substance obtained by the action of dilute acids on saligenin.

Tubular, with a speading border. See Hypocraterimorphous.

A hydrous silicate of magnesia and aluminia. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock.

crystalline; -- said of certain cruptive rocks composed partly of crystalline, partly of amorphous matter.

The metamorphosis of other floral organs into sepals or sepaloid bodies.

ecifically, designating compounds of silicon; as, silicic acid. Silicic acid (Chem.), an amorphous gelatinous substance, Si(HO)4, very unstable and easily dried to silica, but forming many stable salts; -- called also orthosilicic, or normal silicic, acid.

bined in nature, and is artificially obtained in the free state, usually as a dark brown amorphous powder, or as a dark crystalline substance with a meetallic luster. Its oxide is silica, or common quartz, and in this form, or as silicates, it is, next to oxygen, the most abundant element of the earth's crust. Silicon…

ucilaginous carbohydrate, resembling achroödextrin, extracted from squill as a colorless amorphous substance; -- so called because it is levorotatory.

liquor of Libavius. -- Stannic oxide, tin oxide, SnO2, produced artificially as a white amorphous powder, and occurring naturally in the mineral cassiterite. It is used in the manufacture of white enamels, and, under the name of putty powder, for polishing glass, etc.

l, related to glycerin, and obtained from certain styryl derivatives as a yellow, gummy, amorphous substance; - - called also phenyl glycerin.

d of tin (more exactly called metasulphostannic acid), which is obtained as a dark brown amorphous substance, H

r Colias, philodice), which is the common yellow butterfly of the Eastern United States. Amorphous sulphur (Chem.), an elastic variety of sulphur of a resinous appearance, obtained by pouring melted sulphur into water. On standing, it passes back into a brittle crystalline modification. -- Liver of sulphur. (Old Chem.…

an; as, tannic acid. Tannic acid. (Chem.) (a) An acid obtained from nutgalls as a yellow amorphous substance, C14H10O9, having an astringent taste, and forming with ferric salts a bluish-black compound, which is the basis of common ink. Called also tannin, and gallotannic acid.

Pertaining to, or designating, an acid obtained as a white amorphous deliquescent substance, C8H10O11; -- called also ditartaric, tartrilic, or tartrylic acid.

A division of morphology created by Haeckel; the science of organic individuality constituting the purely structural portion of morphology, in which the organism is regarded as composed of organic individuals of different orders, each organ being considered an individual. See Promorphology, and Morphon.…

The earth; earth. Terra alba Etym: [L., white earth] (Com.), a white amorphous earthy substance consisting of burnt gypsum, aluminium silicate (kaolin), or some similar ingredient, as magnesia. It is sometimes used to adulterate certain foods, spices, candies, paints, etc. -- Terra cotta. Etym: [It., fr. terra earth +…