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A white amorphous or crystalline substance obtained by the partial dehydration of mannite.

A white crystalline substance of a sweet taste obtained from a so-called manna, the dried sap of the flowering ash (Fraxinus ornus); -- called also mannitol, and hydroxy hexane. Cf. Dulcite. HO.CH2.(CHOH)4.CH2.OH = D-mannitol; manna sugar; cordycepic acid; Diosmol; Mannicol; Mannidex; Osmiktrol; Osmosal. -- used in ph…

ining to, or resembling, pearl; pearly. Margaric acid. (a) (Physiol. Chem.) A fatty body, crystallizing in pearly scales, and obtained by digesting saponified fats (soaps) with an acid. It was formerly supposed to be an individual fatty acid, but is now known to be simply an intimate mixture of stearic and palmitic aci…

, iron; chalybeate; as, martial preparations. [Archaic] Martial flowers (Med.), a reddish crystalline salt of iron; the ammonio-chloride of iron. [Obs.] -- Martial law, the law administered by the military power of a government when it has superseded the civil authority in time of war, or when the civil authorities are…

Lead protoxide, PbO, obtained as a yellow amorphous powder, the fused and crystalline form of which is called litharge; lead ocher. It is used as a pigment.

In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive. Massive rock (Geol.), a compact crystalline rock not distinctly schistone, as granite; also, with some authors, an eruptive rock.

l the errors; -- called also, especially by European writers, mean error. -- Mean line. (Crystallog.) Same as Bisectrix. -- Mean noon, noon as determined by mean time. -- Mean proportional (between two numbers) (Math.), the square root of their product. -- Mean sun, a fictitious sun supposed to move uniformly in th…

.), designating an acid related to aconitic acid, found in opium and extracted as a white crystalline substance.

ce regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance. Also erroneously called meconina, meconia, etc., as though it were an alkaloid.

A member of the scapolite, group, occuring in glassy crystals on Monte Somma, near Naples.

trogenous base, C3H6N6, produced from several cyanogen compounds, and obtained as a white crystalline substance, -- formerly supposed to be produced by the decomposition of melam. Called also cyanuramide.

rbon obtained artificially (as by the action of cyanogen chloride on aniline) as a white, crystalline substance; -- called also diphenyl guanidin.

ng, a complex nitrogenous acid obtained by decomposition of melam, or of urea, as a white crystalline powder; -- called also melanurenic acid.

ted hydrocarbon, C30H60, of the ethylene series, obtained from beeswax as a white, scaly, crystalline wax; -- called also melissene, and melissylene.

A mineral occurring in small yellow crystals, found in the lavas (melilite basalt) of Vesuvius, and elsewhere. [Written also mellilite.]

pecifically, designating an acid of the aromatic series, obtained from melilot as a white crystalline substance.

Pertaining to, or derived from, the mineral mellite. Mellitic acid (Chem.), a white, crystalline, organic substance, C6(CO2H)6, occurring naturally in combination with aluminium in the mineral mellite, and produced artificially by the oxidation of coal, graphite, etc., and hence called also graphitic acid.…

the oxides of iron and titanium. It is commonly massive, but occurs also in rhombohedral crystals. Called also titanic iron ore, and ilmenite.

culus indicus (the fruit of Anamirta Cocculus, formerly Menispermum Cocculus) as a white, crystalline, tasteless powder; -- called also menispermina.

A white, crystalline, aromatic substance resembling camphor, extracted from oil of peppermint (Mentha); -- called also mint camphor or peppermint camphor.