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The amorphous or homogenous matrix or ground mass, as distinguished from well-defined crystals; as, the magma of porphyry.

ld antacid laxative. See Magnesium. Magnesia alba Etym: [L.] (Med. Chem.), a bulky white amorphous substance, consisting of a hydrous basic carbonate of magnesium, and used as a mild cathartic.

A white amorphous or crystalline substance, obtained by dehydration of mannite, and distinct from, but convertible into, mannitan.

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

Of, pertaining to, resembling, or derived from, mannite. Mannitic acid (Chem.), a white amorphous substance, intermediate between saccharic acid and mannite, and obtained by the partial oxidation of the latter.

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.

A white, amorphous, tenacious substance resembling caoutchouc, and obtained as an insoluble residue of mastic.

or aniline, dyes. It consists of the sulphate of mauveïne, and is a dark brown or bronze amorphous powder, which dissolves to a beatiful purple color. Called also aniline purple, violine, etc.

An alkaloid found in opium, and extracted as a yellow amorphous substance which is easily decomposed.

A comprehensive group of insects, including those that undegro a metamorphosis.

An insect which undergoes a metamorphosis.

Of or pertaining to metamorphosis; pertaining to, or involving, change.

A white, amorphous, insoluble substance regarded as a polymeric variety of chloral.

To metamorphose.

ormerly called antimonic acid) analogous to metaphosphoric acid, and obtained as a white amorphous insoluble substance, (HSbO3).

nic acid), obtained, as an isomeric modification of stannic acid, in the form of a white amorphous substance.

plasmic mass, constituting the egg, is converted into a multitude of cells, which are metamorphosed into the tissues of the body. A central cavity is commonly developed, and the cells around it are at first arranged in two layers, -- the ectoderm and endoderm. The group comprises nearly all animals except the Protozoa.…

The direct development of an embryo, without metamorphosis, into an organism similar to the parent organism; -- opposed to metagenesis. E. van Beneden.

A yellowish white, amorphous, nitrogenous substance found in wheat, rye, etc., and resembling gluten; -- formerly called also mucin.

A brown, amorphous, bitter substance having a strong emetic action, extracted from the root of the mudar.