| straight back syndrome | <syndrome> Loss of the normal concavity of the thoracolumbar spine with a narrowed anteroposterior chest dimension, resulting compression of the heart between spine and sternum, and consequent prominent precordial pulsations, an ejection murmur, and radiologic evidence of a widened cardiac silhouette (pancaked heart). (05 Mar 2000) |
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| straight gyrus | A gyrus running along the medial part of the orbital surface of the frontal lobe of the cerebral hemisphere. It is bounded laterally by the olfactory sulcus. Synonym: gyrus rectus. (05 Mar 2000) |
| straight part of cricothyroid muscle | <anatomy> See: cricothyroid muscle. (05 Mar 2000) |
| straight seminiferous tubule | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| straight tubule | One of the straight tubules of the kidney, present in the medulla and pars radiata of the cortex. Synonym: straight seminiferous tubule. (05 Mar 2000) |
| straight venules of kidney | Venules that drain the medullary pyramids of the kidney; they open into arcuate veins. Synonym: venulae rectae renis. (05 Mar 2000) |
| straightedge | A board, or piece of wood or metal, having one edge perfectly straight, used to ascertain whether a line is straight or a surface even, and for drawing straight lines. Source: Websters Dictionary (01 Mar 1998) |
| straighthorn | <paleontology> An orthoceras. Source: Websters Dictionary (01 Mar 1998) |
| strain | A tearing injury to muscle. Usually causes some degree of bleeding within the muscle tissue (haematoma). (27 Sep 1997) |
| strain birefringence | <chemistry> Optical property of a material in which the refractive index is different for light polarized in one plane compared to the orthogonal plane. May arise from molecular organisation of the material (form birefringence.), alignment of molecules due to tension (stress birefringence.) or alignment of rod like particles in flow (flow birefringence). With crossed Nicoll prisms a birefringent material appears bright against a dark background. (19 Jan 1998) |
| strain development | Improving the genetics of an organism so that it carries out a biotechnological process more effectively. (14 Nov 1997) |
| strain fracture | The tearing off, by a sudden force, of a piece of bone attached to a tendon, ligament, or capsule; the force may be exogenous or endogenous. (05 Mar 2000) |
| strain gauge | A device, employing the Wheatstone bridge principle, used for accurate measurement of forces such as strain, stress, or pressure. (05 Mar 2000) |
| strait | Origin: OE. Straight, streit, OF. Estreit, estroit. See Strait, a. 1. A narrow pass or passage. "He brought him through a darksome narrow strait To a broad gate all built of beaten gold." (Spenser) "Honor travels in a strait so narrow Where one but goes abreast." (Shak) 2. <geography> Specifically: A (comparatively) narrow passageway connecting two large bodies of water; often in the plural; as, the strait, or straits, of Gibraltar; the straits of Magellan; the strait, or straits, of Mackinaw. "We steered directly through a large outlet which they call a strait, though it be fifteen miles broad." (De Foe) 3. A neck of land; an isthmus. "A dark strait of barren land." (Tennyson) 4. A condition of narrowness or restriction; doubt; distress; difficulty; poverty; perplexity; sometimes in the plural; as, reduced to great straits. "For I am in a strait betwixt two." (Phil. I. 23) "Let no man, who owns a Providence, grow desperate under any calamity or strait whatsoever." (South) "Ulysses made use of the pretense of natural infirmity to conceal the straits he was in at that time in his thoughts." (Broome) Source: Websters Dictionary (01 Mar 1998) |
| straitjacket | A garment-like device with long sleeves that can be secured to restrain a violently disturbed person. Synonym: camisole. (05 Mar 2000) |