| PSIFT | platelet suspension immunofluorescence test |
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| RCS | rabbit aorta-contracting substance; red cell suspension; reticulum cell sarcoma; right coronary sinu... |
| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
| SIS | semantic indexing system; serotinin irritation syndrome; simian sarcoma; simulator-induced syndrome;... |
| susp | suspension, suspended |
| gray wedge | <microscopy> An elongated rectangular pattern whose brightness changes from black through shades of gray to white along its length. In calibration wedges, the brightness may vary linearly or logarithmically in discrete steps. (05 Aug 1998) |
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| wedge | 1. To cleave or separate with a wedge or wedges, or as with a wedge; to rive. "My heart, as wedged with a sigh, would rive in twain." 2. To force or drive as a wedge is driven. "Among the crowd in the abbey where a finger Could not be wedged in more." (Shak) "He 's just the sort of man to wedge himself into a snug berth." (Mrs. J. H. Ewing) 3. To force by crowding and pushing as a wedge does; as, to wedge one's way. 4. To press closely; to fix, or make fast, in the manner of a wedge that is driven into something. "Wedged in the rocky shoals, and sticking fast." (Dryden) 5. To fasten with a wedge, or with wedges; as, to wedge a scythe on the snath; to wedge a rail or a piece of timber in its place. 6. To cut, as clay, into wedgelike masses, and work by dashing together, in order to expel air bubbles, etc. Origin: Wedged; Wedging. 1. A piece of metal, or other hard material, thick at one end, and tapering to a thin edge at the other, used in splitting wood, rocks, etc, in raising heavy bodies, and the like. It is one of the six elementary machines called the mechanical powers. 2. <geometry> A solid of five sides, having a rectangular base, two rectangular or trapezoidal sides meeting in an edge, and two triangular ends. 3. A mass of metal, especially when of a wedgelike form. "Wedges of gold." 4. Anything in the form of a wedge, as a body of troops drawn up in such a form. "In warlike muster they appear, In rhombs, and wedges, and half-moons, and wings." (Milton) 5. The person whose name stands lowest on the list of the classical tripos; so called after a person (Wedgewood) who occupied this position on the first list of 1828. Fox wedge. <geometry> The portion of a sphere included between two planes which intersect in a diameter. Origin: OE. Wegge, AS. Wecg; akin to D. Wig, wigge, OHG. Wecki, G. Weck a (wedge-shaped) loaf, Icel. Veggr, Dan. Vaegge, Sw. Vigg, and probably to Lith. Vagis a peg. Cf. Wigg. Source: Websters Dictionary (01 Mar 1998) |
| wedge-and-groove joint | A form of fibrous joint in which the sharp edge of one bone is received in a cleft in the edge of the other, as in the articulation of the vomer with the rostrum of the sphenoid. Synonym: schindylesis, schindyletic joint, wedge-and-groove suture. (05 Mar 2000) |
| wedge-and-groove suture | A form of fibrous joint in which the sharp edge of one bone is received in a cleft in the edge of the other, as in the articulation of the vomer with the rostrum of the sphenoid. Synonym: schindylesis, schindyletic joint, wedge-and-groove suture. (05 Mar 2000) |
| wedge biopsy | Excision of a cuneiform specimen. (05 Mar 2000) |
| wedge bone | See: intermediate cuneiform bone, lateral cuneiform bone, medial cuneiform bone. (05 Mar 2000) |
| wedge pressure | The intravascular pressure reading obtained when a fine catheter is advanced until it completely occludes a small blood vessel or is sealed in place by inflation of a small cuff; commonly measured in the lung to estimate left atrial pressure. (05 Mar 2000) |
| wedge resection | Removal of a wedge-shaped portion of the ovary; used in the treatment of virilizing disorders of ovarian origin, such as the polycystic ovarian syndrome. (05 Mar 2000) |
| wedge-shaped | 1. Having the shape of a wedge; cuneiform. 2. <botany> Broad and truncate at the summit, and tapering down to the base; as, a wedge-shaped leaf. Source: Websters Dictionary (01 Mar 1998) |
| wedge-shaped fasciculus | The larger lateral subdivision of the posterior funiculus. Synonym: fasciculus cuneatus, Burdach's column, Burdach's fasciculus, Burdach's tract, cuneate funiculus, wedge-shaped fasciculus. (05 Mar 2000) |
| wedge-shaped tubercle | tubercle of cuneate nucleus |
| wedge-shell | <zoology> Any one of numerous species of small marine bivalves belonging to Donax and allied genera in which the shell is wedge-shaped. Source: Websters Dictionary (01 Mar 1998) |
| wedge spirometer | A waterless spirometer constructed of two large rectangular plates with edges connected by accordion-pleated rubber so that large changes in volume are accommodated by small changes in the acute angle of the wedge-shaped interior, sensed by an electrical transducer; designed for rapid response by reducing the acceleration of the moving parts. (05 Mar 2000) |
| wedge-tailed | <ornithology, zoology> Having a tail which has the middle pair of feathers longest, the rest successively and decidedly shorter, and all more or less attenuate; said of certain birds. Wedge-tailed eagle, an Australian eagle (Aquila audax) which feeds on various small species of kangaroos, and on lambs; called also mountain eagle, bold eagle, and eagle hawk. Wedge-tailed gull, an arctic gull (Rhodostethia rosea) in which the plumage is tinged with rose; called also Ross's gull. Source: Websters Dictionary (01 Mar 1998) |
| pulmonary capillary wedge pressure | The pressure obtained when a catheter is passed from the right side of the heart into the pulmonary artery as far as it will go and "wedged" into an end artery. PCWP is measured by letting pulmonary blood flow guide a balloon-flotation catheter into a small pulmonary end artery. The pressure distal to the wedged catheter is an approximation of cardiac left atrial pressure. The pressure recorded with the balloon deflated is pulmonary artery pressure. (05 Mar 2000) |