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A species of jalap, of very feeble properties, said to be obtained from the root of a species of Convolvulus (C. Mechoacan); -- so called from Michoacan, in Mexico, whence it is obtained.

Pertaining to, or obtained from, the poppy or opium; specif. (Chem.), designating an acid related to aconitic acid, found in opium and extracted as a white crystalline substance.

Pertaining to, or designating, an acid which occurs in opium, and which may be obtained by oxidizing narcotine.

enough when in dry masses to float in water. It is a hydrous silicate of magnesia, and is obtained chiefly in Asia Minor. It is manufacturd into tobacco pipes, cigar holders, etc. Also called sepiolite.

A strong nitrogenous 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.

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

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

Pertaining to, or designating, an acid obtained from molasses or glucose, and probably identical with saccharic acid. See Saccharic.

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

Of, pertaining to, or obtained from, sweet clover or meliot; specifically, designating an acid of the aromatic series, obtained from melilot as a white crystalline substance.

Pertaining to, or derived from, beeswax; specif., denoting an acid obtained by oxidation of myricin.

A yellow powder, C6H3N9, obtained from certain sulphocyanates. It has acid properties and forms compounds called mellonides.

Pertaining to, or obtained from, moonseed (Menispermum), or other plants of the same family, as the Anamirta Cocculus.

An alkaloid distinct from picrotoxin and obtained from the cocculus indicus (the fruit of Anamirta Cocculus, formerly Menispermum Cocculus) as a white, crystalline, tasteless powder; -- called also menispermina.

A colorless liquid hydrocarbon resembling oil of turpentine, obtained by dehydrating menthol. It has an agreeable odor and a cooling taste.

The process or operation of obtaining the mercury, in its fluid form, from mercuric minerals.

To obtain mercury from, as mercuric minerals, which may be done by any application of intense heat that expels the mercury in fumes, which are afterward condensed. [R.]

A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one ato…

Pertaining to, or designating, one of several isomeric acids obtained from citric acid.

in mesityl oxide. Mesityl oxide (Chem.), a volatile liquid having the odor of peppermint, obtained by certain dehydrating agents from acetone; -- formerly called also dumasin.