| CM | California mastitis [test]; calmodulin; capreomycin; carboxymethyl; cardiac murmur; cardiac muscle; ... |
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| DCS | decompression sickness; dense canalicular system; diffuse cortical sclerosis; dorsal column stimulat... |
| DHS | delayed hypersensitivity; diabetic hyperosmolar state; duration of hospital stay; dynamic hip screw |
| ISI | International Sensitivity Index of reagent/instrument combination |
| LVFP | Left Ventricular Filling Pressure |
| screw | 1. To turn, as a screw; to apply a screw to; to press, fasten, or make firm, by means of a screw or screws; as, to screw a lock on a door; to screw a press. 2. To force; to squeeze; to press, as by screws. "But screw your courage to the sticking place, And we'll not fail." (Shak) 3. Hence: To practice extortion upon; to oppress by unreasonable or extortionate exactions. "Our country landlords, by unmeasureable screwing and racking their tenants, have already reduced the miserable people to a worse condition than the peasants in France." (swift) 4. To twist; to distort; as, to screw his visage. "He screwed his face into a hardened smile." (Dryden) 5. To examine rigidly, as a student; to subject to a severe examination. To screw out, to press out; to extort. To screw up, to force; to bring by violent pressure. To screw in, to force in by turning or twisting. Origin: Screwed; Screwing. 1. A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove, between one turn and the next, used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the sliding of the threads of the cylinder in the grooves between the threads of the perforation adapted to it, the former being distinguished as the external, or male screw, or, more usually the screw; the latter as the internal, or female screw, or, more usually, the nut. The screw, as a mechanical power, is a modification of the inclined plane, and may be regarded as a right-angled triangle wrapped round a cylinder, the hypotenuse of the marking the spiral thread of the screw, its base equaling the circumference of the cylinder, and its height the pitch of the thread. 2. Specifically, a kind of nail with a spiral thread and a head with a nick to receive the end of the screw-driver. Screws are much used to hold together pieces of wood or to fasten something; called also wood screws, and screw nails. See also Screw bolt, below. 3. Anything shaped or acting like a screw; especially, a form of wheel for propelling steam vessels. It is placed at the stern, and furnished with blades having helicoidal surfaces to act against the water in the manner of a screw. See Screw propeller, below. 4. A steam vesel propelled by a screw instead of wheels; a screw steamer; a propeller. 5. An extortioner; a sharp bargainer; a skinflint; a niggard. 6. An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor. 7. A small packet of tobacco. 8. An unsound or worn-out horse, useful as a hack, and commonly of good appearance. 9. <mathematics> A straight line in space with which a definite linear magnitude termed the pitch is associated (cf. 5th Pitch, 10). It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translation parallel to that axis. 10. <zoology> An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand. Archimedes screw, Compound screw, Foot screw, etc. See Archimedes, Compound, Foot, etc. A screw loose, something out of order, so that work is not done smoothly; as, there is a screw loose somewhere. Endless, or perpetual screw, a screw used to give motion to a toothed wheel by the action of its threads between the teeth of the wheel; called also a worm. Lag screw. See Lag. Micrometer screw, a screw with fine threads, used for the measurement of very small spaces. Right and left screw, a screw having threads upon the opposite ends which wind in opposite directions. Screw alley. See Shaft alley. Screw bean. <botany> The larva of an American fly (Compsomyia macellaria), allied to the blowflies, which sometimes deposits its eggs in the nostrils, or about wounds, in man and other animals, with fatal results. Screw wrench. A wrench for turning a screw. A wrench with an adjustable jaw that is moved by a screw. To put the screw, or screws, on, to use pressure upon, as for the purpose of extortion; to coerce. To put under the screw or screws, to subject to presure; to force. Wood screw, a metal screw with a sharp thread of coarse pitch, adapted to holding fast in wood. Origin: OE. Scrue, OF. Escroue, escroe, female screw, F. Ecrou, L. Scrobis a ditch, trench, in LL, the hole made by swine in rooting; cf. D. Schroef a screw, G. Schraube, Icel. Skrfa. Source: Websters Dictionary (01 Mar 1998) |
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| screw arteries | Coiled artery's into the uterine mucosa or in the macular region of the retina. (05 Mar 2000) |
| screw elevator | A dental instrument with a threaded extremity used for extracting the root of a broken tooth. (05 Mar 2000) |
| screw joint | A variety of hinge joint in which the elevation and depression, respectively, on the opposing articular surfaces form part of a spiral, flexion being then accompanied by a certain amount of lateral deviation. Synonym: screw joint, spiral joint. (05 Mar 2000) |
| screw pinch | <radiobiology> A variant on the theta pinch, in which axial currents (as in a z pinch, but less intense) produce a poloidal magnetic field (in addition to the usual longitudinal field), thus making a corkscrew field configuration. See: theta pinch, z pinch, pinch device. (09 Oct 1997) |
| screw-worm | The larva of the botfly, Cochliomyia hominivorax, and other similar forms that cause human and animal myiasis. (05 Mar 2000) |
| screw worm infection | Infection with larvae of the blow fly cochliomyia hominivorax (callitroga americanum), a common cause of disease in livestock in the southern and southwestern u.s.a. (12 Dec 1998) |
| hindleys screw | <mechanics> A screw cut on a solid whose sides are arcs of the periphery of a wheel into the teeth of which the screw is intended to work. It is named from the person who first used the form. Source: Websters Dictionary (01 Mar 1998) |
| secondary screw-worm | An accidental or facultative screw-worm that enters a prior wound or suppurated condition and feeds on infected rather than intact tissues. Many blowflies are included, such as Calliphora vicina, Phaenicia sericata, Phormia regina, Cochliomyia macellaria, Chrysomyia species, and other fleshflies. (05 Mar 2000) |
| direct filling resin | An autopolymerizing resin especially designed as a dental restorative material. (05 Mar 2000) |
| oesophageal filling defect | <radiology> Tumour, carcinoma (oesophagus, stomach extending proximally), leiomyoma / leiomyosarcoma, polyp: fibrovascular, inflammatory, adenomatous, papilloma, carcinosarcoma, lymphoma, metastasis, oesophageal varix, extrinsic lesion (vascular impression, adenopathy, cyst), foreign body (12 Dec 1998) |
| end-filling | The use of DNA polymerase to create a blunt end (both strands are the same length and end together) on double-stranded DNA that has a staggered end (one strand is longer than the other so there is a single-stranded section at the end of the molecule). (09 Oct 1997) |
| uterine filling defect | <radiology> Technical, bubble, blood clot, mucoid material, congenital fold, pseudoadhesions / ridging -- folds long axis, neoplasm, submucosal leiomyoma, adenoma, endometrial carcinoma, pregnancy-related, pregnancy, molar pregnancy, retained conceptus, polyp, septated uterus, synechiae, IUD, iatrogenic (post-op) (12 Dec 1998) |
| filling | 1. That which is used to fill a cavity or any empty space, or to supply a deficiency; as, filling for a cavity in a tooth, a depression in a roadbed, the space between exterior and interior walls of masonry, the pores of open-grained wood, the space between the outer and inner planks of a vessel, etc. 2. The woof in woven fabrics. 3. Prepared wort added to ale to cleanse it. Back filling. See Back. Source: Websters Dictionary (01 Mar 1998) |
| filling defect | Displacement of contrast medium by a space-occupying lesion in a radiographic study of a contrast-filled hollow viscus, such as a polyp on a barium enema; also applied to defects in the otherwise uniform distribution of radionuclide in an organ, such as a metastasis in the liver on a 99mTc-sulfur colloid scan. (05 Mar 2000) |