| RBF | regional blood flow; regional bone mass; renal blood flow |
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| RCA | red cell agglutination; relative chemotactic activity; renal cell carcinoma; right carotid artery; r... |
| RCC | radiological control center; rape crisis center; ratio of cost to charges; receptor-chemoeffector co... |
| RCCP | renal cell carcinoma, papillary |
| RCIRF | radiologic contrast-induced renal failure |
| spectrometry, mass, secondary ion | A mass-spectrometric technique that is used for microscopic chemical analysis. A beam of primary ions with an energy of 5-20 kiloelectronvolts (kev) bombards a small spot on the surface of the sample under ultra-high vacuum conditions. Positive and negative secondary ions sputtered from the surface are analyzed in a mass spectrometer in regards to their mass-to-charge ratio. (12 Dec 1998) |
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| dentin, secondary | Dentin formed and deposited in response to a normal or slightly abnormal stimulus, after the complete formation of the tooth. (12 Dec 1998) |
| immunization, secondary | Any immunization following a primary immunization and involving exposure to the same or a closely related antigen. (12 Dec 1998) |
| osteoarthropathy, secondary hypertrophic | Symmetrical osteitis of the four limbs, chiefly localised to the phalanges and the terminal epiphyses of the long bones of the forearm and leg, sometimes extending to the proximal ends of the limbs and the flat bones, and accompanied by dorsal kyphosis and joint involvement. It is often secondary to chronic conditions of the lungs and heart. (12 Dec 1998) |