| SMAS | submuscular aponeurotic system; superficial musculo-aponeurotic system; superior mesenteric artery s... |
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| SMV | superior mesenteric vein |
| SO | salpingo-oophorectomy; Schlatter-Osgood [test]; second opinion; sex offender; spheno-occipital [sync... |
| SOF | superior orbital fissure |
| SOM | secretory otitis media; sensitivity of method; serous otitis media; somatotropin; state operations m... |
| Hunter's canal | The space in middle third of the thigh between the vastus medialis and adductor muscles, converted into a canal by the overlying sartorius muscle. It gives passage to the femoral vessels and saphenous nerve, ending at the adductor hiatus. Synonym: canalis adductorius, Hunter's canal, subsartorial canal. (05 Mar 2000) |
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| hyaloid canal | A minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal life a prolongation of the central artery of the retina, the hyaloid artery. See: vitreous, hyaloid artery. Synonym: canalis hyaloideus, central canal of the vitreous, Cloquet's canal, Stilling's canal. (05 Mar 2000) |
| hypoglossal canal | The canal through which the hypoglossal nerve emerges from the skull. Synonym: canalis hypoglossalis, anterior condyloid canal of occipital bone, anterior condyloid foramen. (05 Mar 2000) |
| small canal of chorda tympani | A canal leading from the facial canal to the tympanic cavity through which the chorda tympani nerve enters this cavity. Synonym: canaliculus chordae tympani, iter chordae posterius, small canal of chorda tympani. (05 Mar 2000) |
| Sondermann's canal | A blind outpouching of Schlemm's canal, extending toward, but not communicating with, the anterior chamber of the eye. (05 Mar 2000) |
| spinal canal | The canal that contains the spinal cord, spinal meninges, and related structures. It is formed by the vertebral foramina of successive vertebrae of the articulated vertebral column. Synonym: canalis vertebralis, spinal canal, tubus vertebralis. (05 Mar 2000) |
| spiral canal of cochlea | The winding tube of the bony labyrinth which makes two and a half turns about the modiolus of the cochlea; it is divided incompletely into two compartments by a winding shelf of bone, the bony spiral lamina. Synonym: canalis spiralis cochleae, Rosenthal's canal, spiral canal of cochlea. (05 Mar 2000) |
| spiral canal of modiolus | <anatomy> The space in the modiolus in which the spiral ganglion of the cochlear nerve lies. Synonym: canalis spiralis modioli. (05 Mar 2000) |
| nasolacrimal canal | The bony canal formed by the maxilla, lacrimal bone, and inferior concha that transmits the nasolacrimal duct from the orbit to the inferior meatus of the nose. Synonym: canalis nasolacrimalis. (05 Mar 2000) |
| nerve of pterygoid canal | The nerve constituting the parasympathetic and sympathetic root of the pterygopalatine ganglion; it is formed in the region of the foramen lacerum by the union of the greater superficial petrosal and the deep petrosal nerves, and runs through the pterygoid canal to the pterygopalatine fossa. Synonym: nervus canalis pterygoidei, radix facialis, facial root, vidian nerve. (05 Mar 2000) |
| Stilling's canal | A minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal life a prolongation of the central artery of the retina, the hyaloid artery. See: vitreous, hyaloid artery. Synonym: canalis hyaloideus, central canal of the vitreous, Cloquet's canal, Stilling's canal. (05 Mar 2000) |
| neural canal | The canal within the embryonic neural tube; the primordium of the central canal. (05 Mar 2000) |
| neurenteric canal | A transitory communication between the neural tube, notochordal canal, and gut endoderm in vertebrate embryos, including humans. (05 Mar 2000) |
| subsartorial canal | The space in middle third of the thigh between the vastus medialis and adductor muscles, converted into a canal by the overlying sartorius muscle. It gives passage to the femoral vessels and saphenous nerve, ending at the adductor hiatus. Synonym: canalis adductorius, Hunter's canal, subsartorial canal. (05 Mar 2000) |
| notochordal canal | Invagination of the blastopore into the notochordal process to form a cavity. See: neurenteric canal. Synonym: notochordal canal. (05 Mar 2000) |