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Tethys :: Tethys (n.) A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and are brilliantly colored..

Floscularian :: Floscularian (n.) One of a group of stalked rotifers, having ciliated tentacles around the lobed disk..

Salamander :: Salamander (n.) A culinary utensil of metal with a plate or disk which is heated, and held over pastry, etc., to brown it..

Full-orbed :: Full-orbed (a.) Having the orb or disk complete or fully illuminated; like the full moon.

Starfish :: Starfish (n.) Any one of numerous species of echinoderms belonging to the class Asterioidea, in which the body is star-shaped and usually has five rays, though the number of rays varies from five to forty or more. The rays are often long, but are sometimes so short as to appear only as angles to the disklike body. Called also sea star, five-finger, and stellerid..

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..

Ophiuroidea :: Ophiuroidea (n. pl.) A class of star-shaped echinoderms having a disklike body, with slender, articulated arms, which are not grooved beneath and are often very fragile; -- called also Ophiuroida and Ophiuridea. See Illust. under Brittle star..

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..

Disk :: Disk (n.) In owls, the space around the eyes..

Placentiform :: Placentiform (a.) Having the shape of a placenta, or circular thickened disk somewhat thinner about the middle..

Chaffy :: Chaffy (a.) Bearing or covered with dry scales, as the under surface of certain ferns, or the disk of some composite flowers..

Encrinoidea :: Encrinoidea (n. pl.) That order of the Crinoidea which includes most of the living and many fossil forms, having jointed arms around the margin of the oral disk; -- also called Brachiata and Articulata. See Illusts. under Comatula and Crinoidea..

Discous :: Discous (a.) Disklike; discoid.

Buttonmold :: Buttonmold (n.) A disk of bone, wood, or other material, which is made into a button by covering it with cloth..

Umbo :: Umbo (n.) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvae of echinoderms or in the tympanic membrane of the ear..

Interpubic :: Interpubic (a.) Between the pubic bones or cartilages; as, the interpubic disk..

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

Nimbus :: Nimbus (n.) A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory, n., 5..

Umbra :: Umbra (n.) The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; -- used in contradistinction from penumbra. See Penumbra..

Phonograph :: Phonograph (n.) An instrument for the mechanical registration and reproduction of audible sounds, as articulate speech, etc. It consists of a rotating cylinder or disk covered with some material easily indented, as tinfoil, wax, paraffin, etc., above which is a thin plate carrying a stylus. As the plate vibrates under the influence of a sound, the stylus makes minute indentations or undulations in the soft material, and these, when the cylinder or disk is again turned, set the plate in vibration

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