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Eccentric :: Eccentric (n.) A disk or wheel so arranged upon a shaft that the center of the wheel and that of the shaft do not coincide. It is used for operating valves in steam engines, and for other purposes. The motion derived is precisely that of a crank having the same throw..

Drummond Light :: Drummond light () A very intense light, produced by turning two streams of gas, one oxygen and the other hydrogen, or coal gas, in a state of ignition, upon a ball of lime; or a stream of oxygen gas through a flame of alcohol upon a ball or disk of lime; -- called also oxycalcium light, or lime light..

Sabot :: Sabot (n.) A thick, circular disk of wood, to which the cartridge bag and projectile are attached, in fixed ammunition for cannon; also, a piece of soft metal attached to a projectile to take the groove of the rifling..

Siphonopoda :: Siphonopoda (n. pl.) A division of Scaphopoda including those in which the foot terminates in a circular disk.

Depressed :: Depressed (a.) Concave on the upper side; -- said of a leaf whose disk is lower than the border.

Dichotomize :: Dichotomize (v. t.) To exhibit as a half disk. See Dichotomy, 3..

Gastrodisc :: Gastrodisc (n.) That part of blastoderm where the hypoblast appears like a small disk on the inner face of the epibladst.

Disciferous :: Disciferous (a.) Bearing disks.

Disk :: Disk (n.) A circular structure either in plants or animals; as, a blood disk; germinal disk, etc..

Gastropoda :: Gastropoda (n. pl.) One of the classes of Mollusca, of great extent. It includes most of the marine spiral shells, and the land and fresh-water snails. They generally creep by means of a flat, muscular disk, or foot, on the ventral side of the body. The head usually bears one or two pairs of tentacles. See Mollusca..

Web :: Web (n.) A disk or solid construction serving, instead of spokes, for connecting the rim and hub, in some kinds of car wheels, sheaves, etc..

Dichotomy :: Dichotomy (n.) That phase of the moon in which it appears bisected, or shows only half its disk, as at the quadratures..

Radiate :: Radiate (a.) Having in a capitulum large ray florets which are unlike the disk florets, as in the aster, daisy, etc..

Stentor :: Stentor (n.) Any species of ciliated Infusoria belonging to the genus Stentor and allied genera, common in fresh water. The stentors have a bell-shaped, or cornucopia-like, body with a circle of cilia around the spiral terminal disk. See Illust. under Heterotricha..

Shield :: Shield (n.) In lichens, a Hardened cup or disk surrounded by a rim and containing the fructification, or asci..

Face :: Face (n.) The principal dressed surface of a plate, disk, or pulley; the principal flat surface of a part or object..

Foot :: Foot (n.) The muscular locomotive organ of a mollusk. It is a median organ arising from the ventral region of body, often in the form of a flat disk, as in snails. See Illust. of Buccinum..

Phenakistoscope :: Phenakistoscope (n.) A revolving disk on which figures drawn in different relative attitudes are seen successively, so as to produce the appearance of an object in actual motion, as an animal leaping, etc., in consequence of the persistence of the successive visual impressions of the retina. It is often arranged so that the figures may be projected upon a screen..

Planchet :: Planchet (n.) A flat piece of metal; especially, a disk of metal ready to be stamped as a coin..

Truck :: Truck (v. i.) A small piece of wood, usually cylindrical or disk-shaped, used for various purposes..

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