| LAC | La Crosse [virus]; lactase; left atrial circumflex [artery]; left atrial contraction; linguoaxiocerv... |
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| LANC | long-arm navicular cast |
| LAR | laryngology; late asthmatic response; late reaction; left arm recumbent; leukocyte antigen-related |
| lar | larynx; left arm reclining |
| MAMC | mean arm muscle circumference |
| lateral alveolar abscess | An alveolar abscess located along the lateral root surface of a tooth. Synonym: pericemental abscess. (05 Mar 2000) |
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| lateral angle of eye | The angle formed by the junction of the lateral parts of the upper and lower eyelids. Synonym: angulus oculi lateralis, angulus oculi temporalis, external canthus, lateral canthus. (05 Mar 2000) |
| lateral angle of scapula | The blunt, concave head of the scapula forming the glenoid cavity at the junction of the superior and lateral borders of the bone. Synonym: angulus lateralis scapulae. (05 Mar 2000) |
| lateral angle of uterus | The upper part of the side of the uterus at the point of its junction with the uterine tube. (05 Mar 2000) |
| lateral aperture of the fourth ventricle | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
| lateral arcuate ligament | <anatomy> One of Haller's arches; a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm. Synonym: ligamentum arcuatum laterale, arcus lumbocostalis lateralis, lateral lumbocostal arch. (05 Mar 2000) |
| lateral atlantoaxial joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atlantoepistrophic joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atrial vein | A vein draining deep portions of the temporal and parietal lobes; it runs in the lateral wall of the lateral ventricle to terminate in the superior thalamostriate vein. Synonym: vena ventriculi lateralis lateralis, lateral atrial vein, lateral vein of lateral ventricle. (05 Mar 2000) |
| lateral basal branch | Lateral basal branch of the following: 1) basal part of inferior lobar branch of right pulmonary artery; 2) basal part of inferior lobar branch of left pulmonary artery. Synonym: ramus basalis lateralis. (05 Mar 2000) |
| lateral basal segment | Lateral basal segment of inferior lobe of right and left lung; between anterior and posterior basal segments. Synonym: segmentum basale laterale. (05 Mar 2000) |
| lateral bicipital groove | at the cubital fossa, the groove separating the biceps brachii and brachialis muscles on the lateral side. Synonym: sulcus bicipitalis lateralis. (05 Mar 2000) |
| lateral border | The margin or edge of a structure which is farthest from the midline. Synonym: margo lateralis, lateral margin. (05 Mar 2000) |
| lateral border of foot | The border of the foot between the small toe and the heel. Synonym: margo lateralis pedis, margo fibularis pedis, fibular margin of foot. (05 Mar 2000) |
| lateral border of forearm | An imaginary line running along the outermost extent of the forearm separating anterior and posterior surfaces laterally. Synonym: margo lateralis antebrachii, margo radialis antebrachii, radial border of forearm. (05 Mar 2000) |