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barometer the action of which depends on the varying pressure of the atmosphere upon the elastic top of a metallic box (shaped like a watch) from which the air has been exhausted. An index shows the variation of pressure.

A metal-hubbed wheel of great strength and elasticity, esp. adapted for artillery carriages and motor cars.

The tough, elastic wood of the ash tree.

e of the volute. -- Neutral axis (Mech.), the line of demarcation between the horizontal elastic forces of tension and compression, exerted by the fibers in any cross section of a girder. -- Optic axis of a crystal, the direction in which a ray of transmitted light suffers no double refraction. All crystals, not of t…

A hoop suspended by an elastic strap, in which a young child may be held secure while amusing itself by jumping on the floor.

e (Minusops globosa); also, its milky juice (balata gum), which when dried constitutes an elastic gum called chicle, or chicle gum.

A highly elastic wood, used for fishing rods, etc. The tree is unknown, but it is thought to be East Indian.

A game played with ivory balls o a cloth-covered, rectangular table, bounded by elastic cushions. The player seeks to impel his ball with his cue so that it shall either strike (carom upon) two other balls, or drive another ball into one of the pockets with which the table sometimes is furnished.

A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyst…

A piece of rubber, felt, or woolen cloth, used in the tympan to make it soft and elastic.

A soft, elastic, very durable cap, made of thick, seamless woolen stuff, and worn by men in Scotland. And pbonnets waving high. Sir W. Scott.

To rebound, as an elastic ball.

A weapon made of a strip of wood, or other elastic material, with a cord connecting the two ends, by means of which an arrow is propelled.

A four-wheeled vehicle, having a long elastic board or frame resting on the bolsters or axletrees, and a seat or seats placed transversely upon it; -- called also buck wagon.

short sleeves, and laced tightly over the chest, made of buffalo skin, or other thick and elastic material, worn by soldiers in the 17th century as a defensive covering. -- Buff jerkin, originally, a leather waistcoat; afterward, one of cloth of a buff color. [Obs.] Nares. -- Buff stick (Mech.), a strip of wood cover…

An elastic apparatus or fender, for deadening the jar caused by the collision of bodies; as, a buffer at the end of a railroad car.

A thin, elastic strip of metal, whalebone, wood, or other material, worn in the front of a corset. Her long slit sleeves, stiff busk, puff verdingall, Is all that makes her thus angelical. Marston.

The interlacing osseous plates constituting the elastic porous tissue of certain parts of the bones, esp. in their articular extremities.

Any plant with long, hard, elastic stems, as reeds and bamboos of many kinds; also, the sugar cane.

A tenacious, elastic, gummy substance obtained from the milky sap of several plants of tropical South America (esp. the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies, it is used, espec…