| MAS | magic angle spinning; Manifest Anxiety Scale; maximum average score; McCune-Albright syndrome; mecon... |
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| MAV | mechanical auditory ventricle; minimal alveolar ventilation; minimum apparent viscosity; movement ar... |
| NSAE | nonsupported arm exercise |
| pter | end of short arm of chromosome |
| q | each, every [Lat. quaque]; electric charge; long arm of chromosome; quart; quintal |
| lateral border of humerus | The ridge on the humerus that extends from the greater tubercle to the lateral epicondyle. Synonym: margo lateralis humerii. (05 Mar 2000) |
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| lateral border of kidney | The convex narrow edge separating the anterior and posterior surfaces. Synonym: margo lateralis renis. (05 Mar 2000) |
| lateral border of nail | The sides of the nail extending from the proximal to the free borders. Synonym: margo lateralis unguis. (05 Mar 2000) |
| lateral border of scapula | The edge of the scapula extending from the glenoid fossa to the inferior angle. Synonym: margo lateralis scapulae. (05 Mar 2000) |
| lateral branches | Branches directed away from the midline, to the side. Nomina Anatomica lists lateral branches (ramus lasteralis/rami laterales) of the following: 1) anterior interventricular artery, ramus lateralis interventricularis anterioris arteriae coronariae sinistrae; 2) anterolateral central arteries, rami laterales arteriarum centralium anterolateralium; 3) dorsal primary rami of spinal nerves, rami laterales ramorum dorsalium nervorum cervicalium/thoracalium/lumbalium/sacralium; 4) left branch of portal vein, rami laterales rami sinistri venae portae hepatis; 5) left hepatic duct, ramus lateralis ductus hepatici sinistri; 6) middle lobe branch of right pulmonary artery, ramus lateralis ramorum lobarium medium arteriorum pulmonarium dextrum; 7) supraorbital nerve, ramus lateralis nervi supraorbitalis. Synonym: rami laterales. (05 Mar 2000) |
| lateral canal | A channel leading from the root pulp laterally through the dentin to the periodontal tissue; may be found anywhere in the tooth root, but is more common in the apical third of the root. Synonym: lateral canal. (05 Mar 2000) |
| lateral canthus | 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 cartilage | Cartilaginous plates that extend above the hoof from the caudal angles of the distal phalanx of the horse; they are readily palpated under the skin of the sides of the hoof and assist in distributing the animal's weight during locomotion. (05 Mar 2000) |
| lateral cartilage of nose | The cartilage located in the lateral wall of the nose above the alar cartilage. Synonym: cartilago nasi lateralis. (05 Mar 2000) |
| lateral cartilaginous layer | The narrow lateral portion of the cartilaginous part of the auditory tube. Synonym: lamina lateralis cartilaginis tubae auditivae, lamina cartilaginis lateralis tubae auditivae, lateral cartilaginous layer, lateral layer of cartilaginous auditory tube. (05 Mar 2000) |
| lateral central palmar space | The more lateral (radial) of the central palmar spaces, bounded laterally by the thenar compartment; related distally to the synovial tendon sheath of the index finger and proximally to the common flexor sheath. Synonym: lateral midpalmar space. (05 Mar 2000) |
| lateral cerebral fissure | The deepest and most prominent of the cortical fissures, extending from the anterior perforated substance first laterally at the deep incisure between the frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere, with the superior temporal gyrus as its lower bank, the insula forming its greatly expanded floor. Two short side branches, the ramus anterior and ramus ascendens, divide the inferior frontal gyrus into an orbital part, triangular part, and opercular part. Synonym: sulcus lateralis cerebri, fissura cerebri lateralis, lateral cerebral fissure, sylvian fissure, fissure of Sylvius. (05 Mar 2000) |
| lateral cerebral fossa | The deep depression of the basal surface of the forebrain that corresponds in position to the anterior perforated substance. Bounded medially by the optic tract and rostrally by the orbital surface of the frontal lobe, it extends laterally around the overhanging pole of the temporal lobe into the Sylvian fissure (sulcus lateralis). Synonym: fossa lateralis cerebri, fossa of Sylvius, lateral fossa of brain, vallecula sylvii. (05 Mar 2000) |
| lateral cerebral sulcus | The deepest and most prominent of the cortical fissures, extending from the anterior perforated substance first laterally at the deep incisure between the frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere, with the superior temporal gyrus as its lower bank, the insula forming its greatly expanded floor. Two short side branches, the ramus anterior and ramus ascendens, divide the inferior frontal gyrus into an orbital part, triangular part, and opercular part. Synonym: sulcus lateralis cerebri, fissura cerebri lateralis, lateral cerebral fissure, sylvian fissure, fissure of Sylvius. (05 Mar 2000) |
| lateral cervical nuclei | Diffusely arranged nucleus located in the dorsal portions of the lateral funiculus in about cervical levels C1-C3; synaptic station for the spinocervicothalamic tract. (05 Mar 2000) |