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A chamber surrounding a vessel or tube in which water may be circulated, thereby regulating the temperature or supply of heat to the vessel. Used in laboratory and manufacturing equipment. water- jacketed. Having a water jacket; -- as, a water-jacketed condenser.

A pore by which the water tubes of various invertebrates open externally.

One of a system of tubular excretory organs having external openings, found in many invertebrates. They are believed to be analogous in function to the kidneys of vertebrates. See Illust. under Trematodea, and Sporocyst.

. In some of the species the nest is retort-shaped, with the opening at the bottom of the tube. -- Weavers' shuttle (Zoöl.), an East Indian marine univalve shell (Radius volva); -- so called from its shape. See Illust. of Shuttle shell, under Shuttle.

Expanding into a flat, circular border at top, with scarcely any tube; as, a wheel-shaped corolla.

A perforated steel die through which wires or tubes are drawn to form them.

Tuberculosis, esp. of the lungs.

A bundle of fibers, or a loosely twisted or braided cord, tape, or tube, usually made of soft spun cotton threads, which by capillary attraction draws up a steady supply of the oil in lamps, the melted tallow or wax in candles, or other material used for illumination, in small successive portions, to be burned. But tru…

A gun in the construction of which an inner tube (either entire or in segments) is wound with wire under tension to insure greater soundness and uniformity of resistance. In modern construction hoops and jackets are shrunk on over the wire.

rubby plants, and is found to a less extent in herbaceous stems. It consists of elongated tubular or needle-shaped cells of various kinds, usually interwoven with the shinning bands called silver grain.

ades." Spenser. Woody fiber. (Bot.) (a) Fiber or tissue consisting of slender, membranous tubes tapering at each end. (b) A single wood cell. See under Wood. Goodale. -- Woody nightshade. (Bot.). See Bittersweet, 3 (a). -- Woody pear (Bot.), the inedible, woody, pear-shaped fruit of several Australian proteaceous tre…

The condensing tube of a still, often curved and wound to economize space. See Illust. of Still.

A vacuum tube suitable for producing Röntgen rays.

A large, esculent, farinaceous tuber of various climbing plants of the genus Dioscorea; also, the plants themselves. Mostly natives of warm climates. The plants have netted-veined, petioled leaves, and pods with three broad wings. The commonest species is D. sativa, but several others are cultivated. Chinese yam, a pla…

One of the cells or tubes which inclose the feeling zooids of Bryozoa. See Illust. of Sea Moss.