| mar | 1. To make defective; to do injury to, especially. By cutting off or defacing a part; to impair; to disfigure; to deface. "I pray you mar no more trees with wiring love songs in their barks." (Shak) "But mirth is marred, and the good cheer is lost." (Dryden) "Ire, envy, and despair Which marred all his borrowed visage." (Milton) 2. To spoil; to ruin. "It makes us, or it mars us." "Striving to mend, to mar the subject." Origin: OE. Marren, merren, AS. Merran, myrran (in comp), to obstruct, impede, dissipate; akin to OS. Merrian, OHG. Marrjan, merran; cf. D. Marren, meeren, to moor a ship, Icel. Merja to bruise, crush, and Goth. Marzjan to offend. Cf. Moor. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| asp | <botany> Same as Aspen. "Trembling poplar or asp." <zoology> A small, hooded, poisonous serpent of Egypt and adjacent countries, whose bite is often fatal. It is the Naja haje. The name is also applied to other poisonous serpents, especially. To Vipera aspis of southern Europe. See Haje. Origin: L. Aspis, fr. Gr., cf. OF. Aspe, F. Aspic. <botany> One of several species of poplar bearing this name, especially the Populus tremula, so called from the trembling of its leaves, which move with the slightest impulse of the air. Origin: AS. Aesp, aeps; akin to OHG. Aspa, Icel. Osp, Dan. Aesp, Sw. Asp, D. Esp, G. Espe, aspe, aspe; cf. Lettish apsa, Lith. Apuszis. Source: Websters Dictionary (01 Mar 1998) |
| peptidyl-Asp metalloendopeptidase | <enzyme> Extracellular metalloproteinase secreted by a pseudomonas fragi mutant; partial amino acid sequence given in first source Registry number: EC 3.4.24.33 Synonym: endopeptidase asp-n (26 Jun 1999) |
| RNA, transfer, asp | A transfer RNA which is specific for carrying aspartic acid to sites on the ribosomes in preparation for protein synthesis. (12 Dec 1998) |
| bone within a bone | <radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D (12 Dec 1998) |
| acute reflex bone atrophy | Atrophy of bones, commonly of the carpal or tarsal bones, following a slight injury such as a sprain. See: causalgia, reflex sympathetic dystrophy. Synonym: acute reflex bone atrophy, posttraumatic osteoporosis, Sudeck's syndrome. Origin: L. English sweat (05 Mar 2000) |
| air-bone gap | The difference between the threshold for hearing acuity by bone conduction and by air conduction. (05 Mar 2000) |
| Albrecht's bone | A small bone between the basioccipital and basisphenoid. (05 Mar 2000) |
| allogeneic bone marrow transplant | <haematology, procedure> A bone marrow transplant using marrow collected from a matched healthy donor, usually a brother or sister. The risks associated with the transplant increase with age and 50 years of age is generally regarded as the upper limit. (13 Nov 1997) |
| alveolar bone | That portion of bone in either the maxilla or the mandible which surrounds and supports the teeth. (12 Dec 1998) |
| alveolar bone loss | The resorption of bone in the supporting structures of the maxilla or mandible as a result of periodontal disease. (12 Dec 1998) |
| alveolar supporting bone | alveolar process |
| amyloidosis: bone manifestations | <radiology> Joint pain without radiographic findings, osteoporosis, especially in axial skeleton, lytic lesions that destroy cortex and invade soft tissue, wrist, scaphoid and lunate lesions that may extend into the carpal tunnel, inducing the classic complaints of carpal tunnel syndrome amyloid arthropathy Differential diagnosis: pigmented villonodular synovitis, synovial chondromatosis, rheumatoid arthritis, TB (12 Dec 1998) |
| aneurysmal bone cyst | <radiology> ABC, 10 - 30 yrs, 75% before skeletal maturity, sites: long bones; also, flat bones Findings: metaphyseal if unfused, metaepiphyseal after fusion, lytic, expansile, thin, continuous rim, thin internal bony strands (12 Dec 1998) |
| ankle bone | 1. <anatomy> The astragalus. 2. <surgery> A variety of clubfoot (Talipes calcaneus). See the Note under Talipes. 1. A slope; the inclination of the face of a work. 2. <geology> A sloping heap of fragments of rock lying at the foot of a precipice. Origin: L, the ankle, the ankle bone. (26 Nov 1998) |