| EF | ectopic focus; edema factor; ejection fraction; elastic fibril; electric field; elongation factor; e... |
|---|---|
| ECG | Electro-Cardio-Graphy(-Gram); ½ÉÀüµµ = EKG 1. Conducting System Structu... |
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| NRT | near-real time |
| ROT | real oxygen transport; remedial occupational therapy; right occipito-transverse [fetal position] |
| RECD | real ear to coupler difference |
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| REAL | Revised European American Lymphoma |
| TCCS | Transcranial color-coded real-time sonography |
| FGD | Focus Group Discussions |
| MCF | Mink cell focus-inducing |
| real focus | The point of meeting of convergent rays. (05 Mar 2000) |
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| real | Royal; regal; kingly. "The blood real of Thebes." 1. Actually being or existing; not fictitious or imaginary; as, a description of real life. "Whereat I waked, and found Before mine eyes all real, as the dream Had lively shadowed." (Milton) 2. True; genuine; not artificial; counterfeit, or factitious; often opposed to ostensible; as, the real reason; real Madeira wine; real ginger. "Whose perfection far excelled Hers in all real dignity." (Milton) 5. Relating to things, not to persons. "Many are perfect in men's humors that are not greatly capable of the real part of business." (Bacon) 4. <mathematics> Having an assignable arithmetical or numerical value or meaning; not imaginary. 5. Pertaining to things fixed, permanent, or immovable, as to lands and tenements; as, real property, in distinction from personal or movable property. Chattels real, a burden imposed upon one estate in favor of another estate of another proprietor. Synonym: Actual, true, genuine, authentic. Real, Actual. Real represents a thing to be a substantive existence; as, a real, not imaginary, occurrence. Actual refers to it as acted or performed; and, hence, when we wish to prove a thing real, we often say, "It actually exists," "It has actually been done." Thus its really is shown by its actually. Actual, from this reference to being acted, has recently received a new signification, namely, present; as, the actual posture of affairs; since what is now in action, or going on, has, of course, a present existence. An actual fact; a real sentiment. "For he that but conceives a crime in thought, Contracts the danger of an actual fault." (Dryden) "Our simple ideas are all real; all agree to the reality of things." (Locke) Origin: LL. Realis, fr. L. Res, rei, a thing: cf. F. Reel. Cf. Rebus. Source: Websters Dictionary (01 Mar 1998) |
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| real image | An image formed by the convergence of the actual rays of light from an object. Synonym: inverted image. (05 Mar 2000) |
| real-time ultrasonography | Rapid serial ultrasound images produced using a phased array or scanning transducer; produces a video display of organ motion, such as heart valve or foetal motion. (05 Mar 2000) |
| image real | <microscopy> An image as formed by a lens on a screen, plate or any plane surface. See: image, virtual. (05 Aug 1998) |
| Ghon's focus | Calcification seen in pulmonary parenchyma (usually mid-lung area) and hilar nodes resulting from earlier, usually childhood, infection with tuberculosis. Synonym: Ghon's complex, Ghon's focus, Ghon's primary lesion. (05 Mar 2000) |
| virtual focus | The point from which divergent rays seem to proceed, or that at which they would meet if prolonged backward. (05 Mar 2000) |
| mink cell focus-inducing viruses | Murine leukaemia viruses discovered in 1976 by hartley, wolford, old, and rowe and so named because the viruses originally isolated had the capacity to transform cell foci in mink cell cultures. Mcf viruses are generated in a multi-step process by recombination with other viral types including akr, friend, moloney, and rauscher. (12 Dec 1998) |
| plasma focus | <radiobiology> The Plasma Focus is another device which depends on the pinch effect. Possible applications include both fusion and plasma propulsion, as well as other plasma research. In essence the plasma focus is generated by discharge of a current across the ends of two coaxial insulated conducting pipes. The Plasma Focus caused a huge stir when they generated copious neutrons, until it was discovered that the source of the neutrons was knockoffs from deuterium due to pinch accelerated electrons or ions. Plasma focus is sort of a point version of the Zpinch. (09 Oct 1997) |
| condenser, variable-focus | <microscopy> Essentially an Abbe condenser in which the upper lens element is fixed and the lower movable. The lower lens may be used to focus the illumination between the elements so that it emerges from the stationary lens as a large diameter parallel bundle. The field of low-power objectives may thus be filled without removing the top element. at the opposite extreme it can be adjusted to have a numerical aperture as high as 1.3. See: illumination, critical. (05 Aug 1998) |
| principal focus | The real or virtual meeting point of rays passing into a lens parallel to its axis. (05 Mar 2000) |
| spleen focus-forming viruses | Murine leukaemia viruses that are replication-defective and rapidly transforming. The envelope gene plays an essential role in initiating erythroleukaemia, manifested by splenic foci, splenomegaly, and polycythemia. Spleen focus-forming viruses are generated by recombination with other viral types including friend p (polycythemia), friend a (anaemia), rauscher, and cas (from wild mice at lake casita, california). (12 Dec 1998) |
| natural focus of infection | An ecosystem in which an infectious agent normally persists in nature; e.g., yellow fever virus in a jungle monkey-Haemagogus mosquito ecosystem. (05 Mar 2000) |
| depth of focus | <microscopy> The depth or thickness of the image space that is simultaneously in acceptable focus. The range of distances between a lens and image plane (target in the video pickup device) for which the image formed by the lens at a given setting is clearly focused. With a high-numerical aperture microscope objective, the depth of field is very shallow, but the depth of focus can be quite deep and reach several millimetres. (05 Aug 1998) |
| focus | Group of (frequently neoplastic) cells, identifiable by distinctive morphology or histology. (18 Nov 1997) |
| focus-forming assay | <investigation> A lab technique used to find out if a particular piece of DNA contains oncogenes (genes which are associated with cancer). This is done by putting the DNA into animal cells which normally show contact inhibition, or which stop growing when they come into physical contact with other cells or reach a certain density in the culture. If the cells lose contact inhibition and form areas of densely-packed cells (called foci) after receiving the DNA, it means that the DNA did contain oncogenes. (05 Jan 1997) |
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