| 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 |
| semilunar fasciculus | A compact bundle composed of descending branches of posterior root fibres located near the border between the fasciculi gracilis and cuneatus of the cervical and thoracic spinal cord; it corresponds to the septomarginal fasciculus, Hoche's tract, or oval area of Flechsig in the lumbar, and to the triangle of Philippe-Gombault in the sacral spinal segments; like these, it can be demonstrated only in cases of demyelination resulting from dorsal root lesions. Synonym: fasciculus semilunaris, fasciculus interfascicularis, comma bundle of Schultze, comma tract of Schultze, interfascicular fasciculus. (05 Mar 2000) |
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| semilunar fibrocartilage | See: lateral meniscus, medial meniscus. Stratiform fibrocartilage, a layer of fibrocartilage in the bottom of a groove in a bone through which a tendon runs. (05 Mar 2000) |
| semilunar fold | The curved fold connecting the palatoglossal arch and palatopharyngeal arch above the supratonsillar fossa; it always contains lymphoid tissue. Synonym: plica semilunaris. (05 Mar 2000) |
| semilunar fold of colon | One of the folds of the wall of the colon between sacculations. Synonym: plica sigmoidea, semilunar fold of colon. (05 Mar 2000) |
| semilunar ganglion | The semilunar-shaped ganglion containing the cells of origin of most of the sensory fibres of the trigeminal nerve. It is situated within the dural cleft on the cerebral surface of the petrous portion of the temporal bone and gives off the ophthalmic, maxillary, and part of the mandibular nerves. (12 Dec 1998) |
| semilunar hiatus | A deep, narrow groove in the lateral wall of the middle meatus of the nasal cavity, into which the maxillary sinus, the frontonasal duct, and the middle ethmoid cells open. Synonym: hiatus semilunaris, hiatus ethmoidalis. (05 Mar 2000) |
| semilunar line | The slight groove in the external abdominal wall parallel to the lateral edge of the rectus sheath. Synonym: semilunar line, Spigelius' line. (05 Mar 2000) |
| semilunar notch | A wide, shallow notch on the anterior surface of the cerebellum occupied laterally by the superior cerebellar peduncles and the inferior quadrigeminal bodies medially. Synonym: anterior notch of cerebellum, incisura cerebelli anterior, semilunar notch. (05 Mar 2000) |
| semilunar nucleus of Flechsig | The small ventral region of the ventral posteromedial nucleus of thalamus in which the fibres of the gustatory lemniscus and secondary trigeminal tracts terminate; it projects to the lower part of the postcentral gyrus of the cerebral cortex. Synonym: arcuate nucleus, nucleus arcuatus thalami, nucleus arcuatus, semilunar nucleus of Flechsig, thalamic gustatory nucleus. (05 Mar 2000) |
| semilunar valve | <anatomy, cardiology> Refers to a type of valve, aortic or pulmonic valves. (27 Sep 1997) |
| nodule of semilunar valve | A nodule at the centre of the free border of each semilunar valve at the beginning of the pulmonary artery and aorta. Synonym: nodulus valvulae semilunaris, Arantius' nodule, Bianchi's nodule, corpus arantii, Morgagni's nodule. (05 Mar 2000) |
| superior semilunar lobule | The part of the superior surface of the cerebellar hemisphere lying rostral to the horizontal fissure, and adjoining the folium of the vermis. Synonym: lobulus semilunaris superior, anterior lunate lobule, crus I. (05 Mar 2000) |
| inferior semilunar lobule | The part of the superior surface of the cerebellar hemisphere lying behind the horizontal fissure. Synonym: lobulus semilunaris inferior, crus II, posterior lunate lobule. (05 Mar 2000) |
| internal semilunar fibrocartilage of knee joint | <anatomy> A flat disc-shaped ligament which stabilises and supports the inner aspect of the knee joint. Commonly injured in knee sprains. (27 Sep 1997) |
| external semilunar fibrocartilage | A flat disc-shaped ligament which stabilises and supports the outer aspect of the knee joint. Not as commonly injured as the medical meniscus ligament in knee sprains. (27 Sep 1997) |