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Between the pubic bones or cartilages; as, the interpubic disk.

nifying glass. The observer sees each picture, momentarily, through a slit in a revolving disk, and these glimpses, blended by persistence of vision, give the impression of continuous motion.

, gems, and the like, or in polishing cutlery, etc. It is usually in the form of wheel or disk, which revolves on a vertical axis. Lap joint, a joint made by one layer, part, or piece, overlapping another, as in the scarfing of timbers. -- Lap weld, a lap joint made by welding together overlapping edges or ends. -- I…

ck, a lock that can not be opened when fastened, unless certain movable lettered rings or disks forming a part of in are in such a position (indicated by a particular combination of the letters) as to permit the bolt to be withdrawn. A strange lock that opens with AMEN. Beau. & Fl. -- Letter paper, paper for writing le…

A peculiar genus of rotifers, remarkable for the absence of ciliated disks. By some zoölogists it is thought to be like the ancestral form of the Arthropoda.

A disk which surrounds the mouth and bears the tentacles of the Bryozoa. See Phylactolemata.

Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids. -- n.

n interarticular synovial cartilage or membrane; esp., one of the intervertebral synovial disks in some parts of the vertebral column of birds. Converging meniscus, Diverging meniscus. See Lens.

An order of curious parasitic worms found on crinoids. The body is short and disklike, with four pairs of suckers and five pairs of hook-bearing parapodia on the under side.

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.

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.

ircular; orbiculate. -- Or*bic"u*lar*ly, adv. -- Or*bic"u*lar*ness, n. Orbicular as the disk of a planet. De Quincey.

A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers.

A game adopted from the Indian game, using disks, as of pasteboard, and dice. [U. S. & Eng.]

One of the series of disks or pistons in the chain pump. Knight.

A metallic disk, attached to a strap, and worn the palm of the hand, -- used to push the needle through the canvas, in sewing sails, etc.

out of a gun. Chaucer. Pellet molding (Arch.), a narrow band ornamented with smalt, flat disks.

A division of ciliated Infusoria having a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas. See Vorticella.

ecurring cycle of changes with respect to quantity of illumination or form of enlightened disk; as, the phases of the moon or planets. See Illust. under Moon.

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…