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ative sulphate of ammonia, found in volcanic districts; -- so named from Mascagni, who discovered it.

Composed of, or covered with, lozenge-shaped scales; having lozenge-shaped divisions. Mascled armor, armor composed of small lozenge-shaped scales of metal fastened on a foundation of leather or quilted cloth.

Covered with a mat or mats; as, a matted floor.

a dyestuff produced artificially by the oxidation of commercial aniline, and the first discovered of the so-called coal- tar, 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.…

Low land covered with coarse grass or rank herbage near rives and in marshy places by the sea; as, the salt meadows near Newark Bay.

n insect. Shak. Mealy bug (Zoöl.), a scale insect (Coccus adonidum, and related species), covered with a white powderlike substance. It is a common pest in hothouses.

Pertaining to, or discovered by, J. F. Meckel, a German anatomist. Meckelian cartilage, the cartilaginous rod which forms the axis of the mandible; -- called also Meckel's cartilage.

Of, pertaining to, or discovered by, Meibomius. Meibomian glands, the slender sebaceous glands of the eyelids, which discharge, through minute orifices in the edges of the lids, a fatty secretion serving to lubricate the adjacent parts.

Covered with spots; speckled; variegated. [Obs.]

A principle governing the inheritance of many characters in animals and plants, discovered by Gregor J. Mendel (Austrian Augustinian abbot, 1822-84) in breeding experiments with peas. He showed that the height, color, and other characters depend on the presence of determinating factors behaving as units. In any given g…

The middle bark of a tree; the green layer of bark, usually soon covered by the outer or corky layer, and obliterated.

of the metal, as distinquished from its ores, as magnetic iron. -- Metallic paper, paper covered with a thin solution of lime, whiting, and size. When written upon with a pewter or brass pencil, the lines can hardly be effaced. -- Metallic tinking (Med.), a sound heard in the chest, when a cavity communicating with t…

Pertaining to, or discovered by, Meton, the Athenian. Metonic cycle or year. (Astron.) See under Cycle.

A moth or lepidopterous insect; -- so called because the wings appear as if covered with white dust or powder, like a miller's clothes. Called also moth miller.

Covered with a mitten or mittens. "Mittened hands." Whittier.

and the ostrich. They were probably exterminated by the natives before New Zealand was discovered by Europeans. Some species were much larger than the ostrich.

Covered with, or wearing, a moccasin or moccasins. "Moccasined feet." Harper's Mag.

To become moldy; to be covered or filled, in whole or in part, with a mold.

Covered or filled with mold; consisting of, or resembling, mold.

which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or multivalve.