| BA | Bachelor of Arts; backache; bacterial agglutination; basilar artery; basion; benzyladenine; best amp... |
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| BAD | biological aerosol detection; British Association of Dermatologists |
| BCW | biological and chemical warfare |
| BDS | Bachelor of Dental Surgery; biological detection system; Blessed Dementia Scale |
| BEAR | biological effects of atomic radiation |
| relative biological effectiveness | The ratio of radiation dosages required to produce identical change based on a formula comparing other types of radiation with that of gamma or roentgen rays. (12 Dec 1998) |
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| pest control, biological | The use of biological mechanisms, usually involving living organisms such as bacteria, for the reduction or regulation of the population of noxious, destructive, or dangerous pests. Environmental concerns have focused attention on natural forms of disease control as potentially safe and effective alternatives to chemical pesticides. This has led to increased efforts to develop control strategies that rely on natural predators and parasites or that involve genetically engineered microbial pest control agents. (12 Dec 1998) |
| models, biological | Theoretical representations that simulate the behaviour or activity of biological processes or diseases. For disease models in living animals, disease models, animal is available. Biological models include the use of mathematical equations, computers, and other electronic equipment. (12 Dec 1998) |
| immunologic and biological factors | A collective grouping for biologically active substances that play a role in the functioning of the immune system and those that show biological or physiological activity. (12 Dec 1998) |
| integrated biological hazard potential | <radiobiology> Total biological hazard potential of a collection of radioactive materials summed over their decay lifetimes. One measure of the integrated biological hazard potential is the amount of water one would need to use to dilute the materials to the point where the water would be safe to drink. (09 Oct 1997) |
| Abbe operation | Use of an Abbe flap in plastic surgery of the lips. (05 Mar 2000) |
| Arie-Pitanguy operation | A procedure to reduce a large breast by a lozenge-shaped resection of tissue from its inferior pole. Synonym: Arie-Pitanguy mammaplasty. (05 Mar 2000) |
| Arlt's operation | Transplantation of the eyelashes back from the edge of the lid in trichiasis. (05 Mar 2000) |
| arterial switch operation | Operation for complete transposition of the great arteries; the most common way to repair this defect consists of switching the aorta and pulmonary arteries and implanting the coronary arteries into the neoaorta (the original pulmonary artery). (05 Mar 2000) |
| Baldy's operation | An obsolete operation for retrodisplacement of the uterus, consisting of bringing the round ligaments through the perforated broad ligaments and attaching them to each other and to the back of the uterus. Synonym: Webster's operation. (05 Mar 2000) |
| Ball's operation | Division of the sensory nerve trunks supplying the anus, for relief of pruritus ani. (05 Mar 2000) |
| Barkan's operation | Goniotomy for congenital glaucoma under direct observation of the anterior chamber angle. (05 Mar 2000) |
| Bassini's operation | An operation for an inguinal hernia repair; after reduction of the hernia, the sac is twisted, ligated, and cut off, then a new inguinal canal is made by uniting the edge of the internal oblique muscle to the inguinal ligament, placing on this the cord, and covering the latter by the external oblique muscle. (05 Mar 2000) |
| Baudelocque's operation | An incision through the posterior cul-de-sac of the vagina for the removal of the ovum, in extrauterine pregnancy. (05 Mar 2000) |
| Belsey Mark IV operation | A transthoracic anti-reflux procedure; it restores a 3 to 4 cm length of intraabdominal oesophagus, maintains a narrow diameter of the distal oesophagus by a gastric fundoplication. (05 Mar 2000) |