| slide | 1. The act of sliding; as, a slide on the ice. 2. Smooth, even passage or progress. "A better slide into their business." (Bacon) 3. That on which anything moves by sliding. Specifically: An inclined plane on which heavy bodies slide by the force of gravity, especially. One constructed on a mountain side for conveying logs by sliding them down. A surface of ice or snow on which children slide for amusement. 4. That which operates by sliding. Specifically: A cover which opens or closes an aperture by sliding over it. <machinery> A moving piece which is guided by a part or parts along which it slides. A clasp or brooch for a belt, or the like. 5. A plate or slip of glass on which is a picture or delineation to be exhibited by means of a magic lantern, stereopticon, or the like; a plate on which is an object to be examined with a microscope. 6. The descent of a mass of earth, rock, or snow down a hill or mountain side; as, a land slide, or a snow slide; also, the track of bare rock left by a land slide. 7. <geology> A small dislocation in beds of rock along a line of fissure. 8. A grace consisting of two or more small notes moving by conjoint degrees, and leading to a principal note either above or below. An apparatus in the trumpet and trombone by which the sounding tube is lengthened and shortened so as to produce the tones between the fundamental and its harmonics. 9. A sound which, by a gradual change in the position of the vocal organs, passes imperceptibly into another sound. 10. <engineering> Same as Guide bar, under Guide. A slide valve. <engineering> Slide box, a contrivance for holding, moving, and guiding, the cutting tool, made to slide on ways or guides by screws or otherwise, and having compound motion. Slide rule, a mathematical instrument consisting of two parts, one of which slides upon the other, for the mechanical performance of addition and subtraction, and, by means of logarithmic scales, of multiplication and division. Slide valve. Any valve which opens and closes a passageway by sliding over a port. A particular kind of sliding valve, often used in steam engines for admitting steam to the piston and releasing it, alternately, having a cuplike cavity in its face, through which the exhaust steam passes. It is situated in the steam chest, and moved by the valve gear. It is sometimes called a D valve, a name which is also applied to a semicylindrical pipe used as a sliding valve. In the illustration, a is the cylinder of a steam engine, in which plays the piston p; b the steam chest, receiving its supply from the pipe i, and containing the slide valve s, which is shown as admitting steam to one end of the cylinder through the port e, and opening communication between the exhaust passage f and the port c, for the release of steam from the opposite end of the cylinder. Origin: AS. Slide. Source: Websters Dictionary (01 Mar 1998) |
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| slide micrometer | A scale made on a microscope slide with lines ruled in divisions, usually, of 0.01 mm; typically used to calibrate an ocular micrometer. (05 Mar 2000) |
| slider | 1. One who, or that which, slides; especially, a sliding part of an instrument or machine. 2. <zoology> The red-bellied terrapin (Pseudemys rugosa). Slider pump, a form of rotary pump. Source: Websters Dictionary (01 Mar 1998) |
| sliding | 1. That slides or slips; gliding; moving smoothly. 2. Slippery; elusory. "That sliding science hath me made so bare." (Chaucer) Sliding friction, the timber guides used in launching a vessel. Source: Websters Dictionary (01 Mar 1998) |
| sliding filament hypothesis | The theory that the contracting muscle shortens because two sets of filaments slide past each other. (05 Mar 2000) |
| sliding filament model | <cell biology> Generally accepted model for the way in which contraction occurs in the sarcomere of striated muscle, by the sliding of the thick filaments relative to the thin filaments. (18 Nov 1997) |
| sliding flap | A rectangular flap raised in an elastic area, with its free end adjacent to a defect; the defect is covered by stretching the flap longitudinally until the end comes over it. Synonym: advancement flap, French flap. (05 Mar 2000) |
| sliding hernia | A hernia in which an abdominal viscus forms part of the sac. Synonym: extrasaccular hernia, parasaccular hernia, slipped hernia. (05 Mar 2000) |
| sliding hiatal hernia | <radiology> Axial hernia, concentric hernia, 99% of hiatal hernias, portion of peritoneal sac forms part of wall of hernia, aetiology: rupture of phrenicoesophageal membrane due to repetitive stretching with swallowing, incidence: increases with age Findings: UGI, epiphrenic bulge, distance between B ring and hiatal margin greater than 2cm, tortuous oesophagus, gastroesophageal reflux, greater than 6 thick gastric folds within suprahiatal pouch, CT, dehiscence of diaphragmtic crura greater than 15 mm, pseudomass within/above distal oesophagus, fat (omemtum) surrounding distal oesophagus (12 Dec 1998) |
| sliding hook | A movable attachment used on an orthodontic wire for the application of elastic traction or headgear force. (05 Mar 2000) |
| sliding oblique osteotomy | An oral surgical procedure in which the mandibular ramus is cut vertically from the sigmoid notch to the angle to facilitate posterior repositioning of the mandible in correction of mandibular prognathism; it may be performed extraorally or intraorally, and is similar to vertical osteotomy. (05 Mar 2000) |
| sliding oesophageal hiatal hernia | Displacement of the cardioesophageal junction and the stomach through the oesophageal hiatus. (05 Mar 2000) |
| slim | 1. Worthless; bad. 2. Weak; slight; unsubstantial; poor; as, a slim argument. "That was a slim excuse." 3. Of small diameter or thickness in proportion to the height or length; slender; as, a slim person; a slim tree. Origin: Formerly, bad, worthless, weak, slight, awry, fr. D. Slim; akin to G. Schlimm, MHG. Slimp oblique, awry; of uncertain origin. The meaning of the English word seems to have been influenced by slender. Source: Websters Dictionary (01 Mar 1998) |
| slime | 1. Soft, moist earth or clay, having an adhesive quality; viscous mud. "As it [Nilus] ebbs, the seedsman Upon the slime and ooze scatters his grain." (Shak) 2. Any mucilaginous substance; any substance of a dirty nature, that is moist, soft, and adhesive. 3. Bitumen. "Slime had they for mortar." (Gen. Xi. 3) 4. <chemical> Mud containing metallic ore, obtained in the preparatory dressing. 5. <physiology> A mucuslike substance which exudes from the bodies of certain animals. Slime eel. <zoology> See Hag. Slime pit, a pit for the collection of slime or bitumen. Origin: OE. Slim, AS. Slim; akin to D. Slijm, G. Schleim, MHG. Slimen to make smooth, Icel. Slim slime, Dan. Sliim; cf. L. Limare to file, polish, levis smooth, Gr.; or cf. L. Limus mud. Source: Websters Dictionary (01 Mar 1998) |
| slime fever | Leptospiral infection with jaundice, presumably infection by Leptospira icterohemorrhagica. (05 Mar 2000) |