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A metallic element separated from ytterbium in 1907, by Urbain in Paris and by von Welsbach in Vienna. Symbol, Lu; at. wt. 174.0.

A heavy staff or club of metal; a spiked club; -- used as weapon in war before the general use of firearms, especially in the Middle Ages, for breaking metal armor. Chaucer. Death with his mace petrific . . . smote. Milton.

- Machine gun.See under Gun. -- Machine screw, a screw or bolt adapted for screwing into metal, in distinction from one which is designed especially to be screwed into wood. -- Machine shop, a workshop where machines are made, or where metal is shaped by cutting, filing, turning, etc. -- Machine tool, a machine for…

cture of an object as seen by the naked eye (that is, unmagnified); as, a macrograph of a metallic fracture.

papers or compositions. Magazine dress, clothing made chiefly of woolen, without anything metallic about it, to be worn in a powder magazine. -- Magazine gun, a portable firearm, as a rifle, with a chamber carrying cartridges which are brought automatically into position for firing. -- Magazine stove, a stove having…

eposited by precipitation; -- applied in old chemistry to certain white precipitates from metallic solutions; as, magistery of bismuth. Ure.

A light silver-white metallic element, malleable and ductile, quite permanent in dry air but tarnishing in moist air. It burns, forming (the oxide) magnesia, with the production of a blinding light (the so-called magnesium light) which is used in signaling, in pyrotechny, or in photography where a strong actinic illumi…

Any metal, as iron, nickel, cobalt, etc., which may receive, by any means, the properties of the loadstone, and which then, when suspended, fixes itself in the direction of a magnetic meridian.

Capable of becoming a magnet; susceptible to magnetism; as, the magnetic metals.

oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.

A flexible fabric made of metal rings interlinked. It was used especially for defensive armor. Chaucer. Chain mail, Coat of mail. See under Chain, and Coat.

extended or shaped by beating with a hammer, or by the pressure of rollers; -- applied to metals. Malleable iron, iron that is capable of extension or of being shaped under the hammer; decarbonized cast iron. See under Iron. -- Malleable iron castings, articles cast from pig iron and made malleable by heating then for…

The act or process of beating into a plate, sheet, or leaf, as a metal; extension by beating.

A bar of metal inserted in the work to shape it, or to hold it, as in a lathe, during the process of manufacture; an arbor.

An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8.

A compound of manganese dioxide with a metallic oxide; so called as though derived from the hypothetical manganous acid.

the Bessemer process for decarbonizing cast iron. So called from Pierre Manhès, a French metallurgist, who invented it.

ivoted so that it can be moved in one direction by a small plunger operated by an elastic metal diaphragm which closes a tube connected with the engine cylinder. It is also moved at right angles to this direction by a reducing motion, called a reproducer, so as to copy accurately on a smaller scale the motion of the en…

r or other gas in a closed tube with mercury or other liquid intervening, or in bending a metallic or other spring so as to set in motion an index; a pressure gauge. See Pressure, and Illust. of Air pump.

A musket-proof shield of rope, wood, or metal, which is sometimes used for the protection of sappers or riflemen while attacking a fortress, or of gunners at embrasures; -- now commonly written mantlet.