| CDP | chondrodysplasia punctata; chronic destructive periodontitis; collagenase-digestible protein; contin... |
|---|---|
| JP | Jackson-Pratt [drain]; joining peptide; juvenile periodontitis |
| AER | abduction/external rotation; acoustic evoked response; acute exertional rhabdomyolysis; agranular en... |
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| ACI | acceleration index; acoustic comfort index; acute cardiac ischemia; acute coronary infarction; acute... |
acute angle
acute arthritis
acute monocytic leukemia
| origin | 1. The first existence or beginning of anything; the birth. "This mixed system of opinion and sentiment had its origin in the ancient chivalry." (Burke) 2. That from which anything primarily proceeds; the fountain; the spring; the cause; the occasion. 3. <anatomy> The point of attachment or end of a muscle which is fixed during contraction; in contradistinction to insertion. <mathematics> Origin of coordinate axes, the point where the axes intersect. See Note under Ordinate. Synonym: Commencement, rise, source, spring, fountain, derivation, cause, root, foundation. Origin, Source. Origin denotes the rise or commencement of a thing; source presents itself under the image of a fountain flowing forth in a continuous stream of influences. The origin of moral evil has been much disputed, but no one can doubt that it is the source of most of the calamities of our race. "I think he would have set out just as he did, with the origin of ideas the proper starting point of a grammarian, who is to treat of their signs." (Tooke) "Famous Greece, That source of art and cultivated thought Which they to Rome, and Romans hither, brought." (Waller) Origin: F. Origine, L. Origo, -iginis, fr. Oriri to rise, become visible; akin to Gr. To stir up, rouse, Skr. R, and perh. To E. Run. Source: Websters Dictionary (01 Mar 1998) |
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| origin of replication | <molecular biology> Regions of DNA that are necessary for its replication to begin, such as pBR322 ori, required for plasmid replication. (18 Nov 1997) |
| ectal origin | Superficial origin, or apparent origin, the point where the nerve emerges from the brain. Origin: L. Origo, source, beginning, fr. Orior, to rise (05 Mar 2000) |
| ental origin | Deep origin, or real origin, the cell group in the brain or medulla, whence the fibres of the nerve begin, and the (05 Mar 2000) |
| fever of unknown origin | Fever in which the aetiology cannot be ascertained. (12 Dec 1998) |
| apical | <anatomy> Relating to or located at the tip (an apex). (09 Oct 1997) |
| apical abscess | <dentistry> A dental abscess that occurs at the end of a root, caused by tooth decay which invades the pulp chamber of the tooth. Involvement of the pulp chamber can lead to destruction of the nerve and blood vessels which supply the tooth. These infections must be treated by root canal therapy (endodontics) or tooth extraction. (27 Sep 1997) |
| apical angle | The angle between two plane surfaces of a prism. Synonym: refracting angle of a prism. (05 Mar 2000) |
| apical-aortic conduit | A valved conduit between the LV apex and aorta, used to treat severe otherwise unapproachable LV outflow tract obstruction. (05 Mar 2000) |
| apical area | The area about the root end of a tooth. (05 Mar 2000) |
| apical branch | The apical branch of the following: 1) superior lobar branches of left and right pulmonary arteries; 2) left superior pulmonary vein. Synonym: ramus superior. Synonym: ramus apicalis. (05 Mar 2000) |
| apical branch of inferior lobar branch of right pulmonary artery | <anatomy, artery> Branch (of the inferior lobar branch) of the right pulmonary artery serving the apical segment of the inferior lobe of the right lung. Synonym: ramus apicalis lobi inferioris arteriae pulmonalis dextrae. (05 Mar 2000) |
| apical cap | <radiology> Local pleural thickening at lung apex, ascribed incorrectly to TB, aetiology: non-specific fibrous scarring (most common), Pancoast tumour (12 Dec 1998) |
| apical complex | A set of anterior structures that characterise one or several developmental stages of members of the protozoan phylum Apicomplexa; includes the following structures, visible by electron microscopy: polar ring, conoid, rhoptries, micronemes, and subpellicular tubules. (05 Mar 2000) |
| apical dendrite | The dendritic process extending from the apex of a pyramidal cell of the cerebral cortex toward the surface. Synonym: apical dendrite. (05 Mar 2000) |