| MRV | minute respiratory volume; mixed respiratory vaccine |
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| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
| URD | unspecified respiratory disease; upper respiratory disease |
| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |
| RR | 1) Respiratory Rate 2) Relative Risk; 비교위험도 &n... |
| respiratory mucosa | Pseudostratified ciliated columnar epithelium with goblet cells and a lamina propria containing, in addition to connective tissue, numerous seromucous glands and in some regions many thin-walled veins which line the airways. See: region of respiratory mucosa. (05 Mar 2000) |
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| respiratory murmur | The respiratory murmur heard on auscultating over the normal lung. Synonym: respiratory murmur, vesicular murmur. (05 Mar 2000) |
| respiratory muscles | These include the muscles of the diaphragm and the intercostal muscles. (12 Dec 1998) |
| respiratory pause | Cessation of air flow for less than 10 seconds. See: sleep apnea. (05 Mar 2000) |
| respiratory physiology | Functions and activities of the respiratory tract as a whole or of any of its parts. (12 Dec 1998) |
| respiratory pigments | The oxygen-carrying (coloured) substances in blood and tissues (haemoglobin, myoglobin, haemocyanin, etc.). (05 Mar 2000) |
| respiratory poison | A compound that inhibits the respiratory chain. Synonym: respiratory poison. (05 Mar 2000) |
| respiratory protective devices | Respirators to protect individuals from breathing air contaminated with harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors. (12 Dec 1998) |
| respiratory pulse | Waxing and waning of any pulsation produced by respiration. (05 Mar 2000) |
| respiratory quotient | <physiology> Molar ratio of carbon dioxide production to oxygen consumption. (18 Nov 1997) |
| respiratory region of tunica mucosa of nose | The area commencing at the vestibule of the nose lined with respiratory mucosa; with the exception of the olfactory mucusa, it includes the entire nasal cavity. Synonym: regio respiratoria tunicae mucosae nasi, respiratory region of tunica mucosa of nose. (05 Mar 2000) |
| respiratory scleroma | Rhinoscleroma in which the lesion involves the mucous membrane of the greater part or all of the upper respiratory tract. (05 Mar 2000) |
| respiratory sound | A murmur, bruit, fremitus, rhonchus, or rale heard on auscultation over the lungs or any part of the respiratory tract. (05 Mar 2000) |
| respiratory sounds | Any sound emanating from any portion of the respiratory tract, especially those heard on auscultation; includes breath sounds. (12 Dec 1998) |
| respiratory syncytial virus | <virology> This RNA virus is a member of the Paramyxoviridae family and is a major pathogen in the upper and lower respiratory tract in both infants and younger children. Respiratory syncytial virus manifestations include bronchiolitis, pneumonia and croup. Acronym: RSV (27 Sep 1997) |