| RRT | random response technique; Registered Respiratory Therapist; relative retention time |
|---|---|
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| RTC | random control trial; rape treatment center; renal tubular cell; residential treatment center; retur... |
| RV | random variable; rat virus; Rauscher virus; rectovaginal; reinforcement value; renal vein; residual ... |
| SRAM | static random access memory |
| pattern formation | <cell biology> One of the classic problems in developmental biology is the way in which complex patterns are formed from an apparently uniform field of cells. Various hypotheses have been put forward and there is now evidence for the existence of gradients of diffusible substances (morphogens) specifying the differentiative pathway that should be followed according to the concentration of the morphogen around the cell. (18 Nov 1997) |
|---|---|
| pattern recognition | In information retrieval, machine-sensing or identification of visible patterns (shapes, forms, and configurations). (harrod's librarians' glossary, 7th ed) (12 Dec 1998) |
| pattern recognition, visual | Visually perceived characters, shapes, displays, or designs. (12 Dec 1998) |
| pattern sensitive epilepsy | A form of reflex epilepsy precipitated by viewing certain patterns. (05 Mar 2000) |
| reticulonodular pattern | A somewhat net-like chest radiographic pattern, with nodular thickening at the intersections of the lines; a non-specific interstitial pattern. (05 Mar 2000) |
| reverse pulmonary oedema pattern | <radiology> Loeffler pneumonia, chronic eosinophilic pneumonia (12 Dec 1998) |
| ground-glass pattern | Radiographic or CT appearance of hazy opacity which fails to obscure pulmonary vascular markings. (05 Mar 2000) |
| RNA splicing pattern | <molecular biology> The combination of DNA sequences copied from a gene by messenger RNA. The mRNAs transcribed from a single gene may splice together different parts of the sequence of the gene. (23 Aug 1998) |
| miliary pattern | A chest radiographic pattern of fine, rounded opacities, typical of haematogenous dissemination of tuberculosis; size has some relationship to that of a millet seed. (05 Mar 2000) |
| moire pattern | <microscopy> A pattern developed from interference or light blocking, when gratings, screens, or regularly spaced patterns are superimposed on one another. (05 Aug 1998) |
| wax pattern | A pattern of wax that, when invested and burned out or otherwise eliminated, will produce a mold in which a casting may be made. Synonym: wax form. (05 Mar 2000) |
| mosaic pattern | On high-resolution CT scans of the lungs, a pattern of brighter and darker regions corresponding to differences in perfusion or aeration; found in some cases of chronic thromboembolism or of bronchiolitis obliterans. Compare: oligaemia. (05 Mar 2000) |
| honeycomb pattern | Dense, slightly irregular circular shadows, most common next to the pleura at the lung base, on chest radiographs or CT; caused by chronic interstitial fibrosis of diverse causes. (05 Mar 2000) |
| hourglass pattern | A vigorous ringlike contraction observed angiographically in the left ventricular angiogram in the right anterior oblique projection, resembling an hourglass; it is seen in the prolapsed mitral valve leaflet syndrome. (05 Mar 2000) |
| interstitial pattern | One of several chest radiographic patterns associated with interstitial infiltration or thickening, including honeycomb pattern, miliary pattern, reticulonodular pattern, or septal lines. (05 Mar 2000) |