| ICS | ileocecal sphincter; immotile cilia syndrome; impulse-conducting system; integrated case study; inte... |
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| LIS | laboratory information system; lateral intercellular space; left intercostal space; library informat... |
| RVS | rectovaginal space; relative value scale/study; reported visual sensation; retrovaginal space |
| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
| VVS | vesicovaginal space; vesicovaginal space; vestibulo-vegetative syndrome |
| f2 fragment | <immunology> A fragment of an antibody protein which includes the antigen-binding portions but not the Fc section. They can be produced by treating whole antibodies with proteases that will specifically cleave off the Fc section. (09 Oct 1997) |
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| Fab fragment | The antigen-binding fragment of an immunoglobulin molecule, consisting of both a light chain and part of a heavy chain. Synonym: Fab piece. (05 Mar 2000) |
| Fc fragment | <immunology> The constant region on an immunoglobulin molecule. The area that is exactly the same on all antibodies. The region is found on the heavy chains and is not involved in binding antigens. (09 Oct 1997) |
| Klenow fragment | <molecular biology> Larger part of the bacterial DNA polymerase I (76 kD) that remains after treatment with subtilisin, retains some but not all exonuclease and polymerase activity. (18 Nov 1997) |
| fragment | A small part broken from a larger entity. (05 Mar 2000) |
| fragment reaction | A reaction used to assay the activity of peptidyl transferase. (05 Mar 2000) |
| alveolar dead space | The difference between physiologic dead space and anatomical dead space; it represents that part of the physiologic dead space resulting from ventilation of relatively underperfused or nonperfused alveoli; it differs specifically in being placed so as to fill and empty in parallel with functional alveoli, rather than being interposed in the conducting tubes between functional alveoli and the external environment. (05 Mar 2000) |
| anatomical dead space | The volume of the conducting airways from the external environment (at the nose and mouth) down to the level at which inspired gas exchanges oxygen and carbon dioxide with pulmonary capillary blood; formerly presumed to extend down to the beginning of alveolar epithelium in the respiratory bronchioles, but more recent evidence indicates that effective gas exchange extends some distance up the thicker-walled conducting airways because of rapid longitudinal mixing. Compare: alveolar dead space, physiologic dead space. Synonym: anatomical airway. (05 Mar 2000) |
| antecubital space | The fossa in front of the elbow, bounded laterally and medially by the humeral origins of the extensors and flexors of the forearm, respectively, and superiorly by an imaginary line connecting the humeral condyles. Synonym: fossa cubitalis, antecubital space, chelidon, triangle of elbow. (05 Mar 2000) |
| anterior clear space | On lateral chest radiographs, the region dorsal to the sternum and ventral to the ascending aorta. Synonym: anterior clear space. (05 Mar 2000) |
| apical space | The space between the alveolar wall and the apex of the root of a tooth where an alveolar abscess usually has its origin. (05 Mar 2000) |
| axillary space | <anatomy> The underarm area. (16 Dec 1997) |
| Berger's space | The space between the patellar fossa of the vitreous and the lens. (05 Mar 2000) |
| Bogros' space | A triangular space between the peritoneum and the transversalis fascia, at the lower angle of which is the inguinal ligament; it contains the lower portion of the external iliac artery. Synonym: Bogros' space, spatium retroinguinale. (05 Mar 2000) |
| Bottcher's space | The blind pouch at the end of the endolymphatic duct. (12 Dec 1998) |