| SP | sacroposterior; sacrum to pubis; salivary progesterone; schizotypal personality; semi-private [room]... |
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| SPA | salt-poor albumin; sheep pulmonary adenomatosis; sperm penetration assay; spinal progressive amyotro... |
| SSA | salicylsalicylic acid; sicca syndrome A; skin-sensitizing antibody; skin sympathetic activity; Sjogr... |
| SSL | secure sockets layer; skin surface lipid; sufficient sleep |
| ST | esotropia; scala tympani; scaphotrapezoid; sclerotherapy; sedimentation time; semitendinosus; sensor... |
| SP220K cell surface matrix proteinase | <enzyme> Inactive form has guanidinobenzoatase activity; active form has gelatinolytic activity Registry number: EC 3.4.21.- Synonym: sp220k enzyme (26 Jun 1999) |
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| nasal surface of maxilla | The surface of the maxilla that forms part of the lateral nasal wall with a large defect (maxillary hiatus) posteriorly and the lacrimal sulcus in its midportion. Synonym: facies nasalis maxillae. (05 Mar 2000) |
| nasal surface of palatine bone | The nasal surface of the perpendicular lamina of the palatine bone that forms part of the lateral wall of the nasal cavity, the nasal surface of the horizontal lamina of the palatine bone that forms part of the floor of the nasal cavity. Synonym: facies nasalis ossis palatini. (05 Mar 2000) |
| navicular articular surface of talus | The large convex surface on the head of the talus for articulation with the navicular bone. Synonym: facies articularis navicularis tali. (05 Mar 2000) |
| sternal articular surface of clavicle | The oval surface on the sternal end of the clavicle that articulates with the fibrocartilaginous disk of the sternoclavicular joint. Synonym: facies articularis sternalis claviculae. (05 Mar 2000) |
| sternocostal surface of heart | The anterior aspect of the heart, formed mostly by the right ventricle and to a lesser extent the left ventricle. Synonym: facies sternocostalis cordis. (05 Mar 2000) |
| subocclusal surface | A portion of the occlusal surface of a tooth which is below the level of the occluding portion of the tooth. (05 Mar 2000) |
| superior articular surface of tibia | The articular surface on the proximal end of the tibia that is divided into medial and lateral portions for articulation with the condyles of the femur. Synonym: facies articularis superior tibiae. (05 Mar 2000) |
| superior part of diaphragmatic surface of liver | The convex superior portion of the diaphragmatic surface of the liver. Synonym: pars superior faciei diaphragmaticae hepatis. (05 Mar 2000) |
| superior surface of cerebellar hemisphere | It lies against the under surface of the tentorium and includes the ala lobuli centralis, quadrangular lobule, simple lobule, and superior semilunar lobule. Synonym: facies superior hemispherii cerebelli. (05 Mar 2000) |
| superior surface of talus | The surface of the trochlea of the talus in contact with the inferior articular surface of the tibia. Synonym: facies superior tali. (05 Mar 2000) |
| superolateral cerebral surface | The aspect of the cerebral hemisphere that lies in contact with the flat bones of the skull; it includes parts of the frontal, parietal, temporal, and occipital lobes. Synonym: facies superolateralis cerebri, cortical convexity, superolateral cerebral surface. (05 Mar 2000) |
| superolateral surface of cerebrum | The aspect of the cerebral hemisphere that lies in contact with the flat bones of the skull; it includes parts of the frontal, parietal, temporal, and occipital lobes. Synonym: facies superolateralis cerebri, cortical convexity, superolateral cerebral surface. (05 Mar 2000) |
| surface | 1. The exterior part of anything that has length and breadth; one of the limits that bound a solid, especially. The upper face; superficies; the outside; as, the surface of the earth; the surface of a diamond; the surface of the body. "The bright surface of this ethereous mold." (Milton) 2. Hence, outward or external appearance. "Vain and weak understandings, which penetrate no deeper than the surface." (V. Knox) 3. <geometry> A magnitude that has length and breadth without thickness; superficies; as, a plane surface; a spherical surface. 4. That part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion. Caustic surface, Heating surface, etc. See Caustic, Heating, etc. Surface condensation, Surface condenser. See Condensation, and Condenser. Surface gauge, a plate having an accurately dressed flat surface, used as a standard of flatness by which to test other surfaces. Surface printing, printing from a surface in relief, as from type, in distinction from plate printing, in which the ink is contained in engraved lines. Origin: F. See Sur-, and Face, and cf. Superficial. Source: Websters Dictionary (01 Mar 1998) |
| surface-active | Indicating the property of certain agents of altering the physicochemical nature of surfaces and interfaces, bringing about lowering of interfacial tension; they usually possess both lipophilic and hydrophilic groups. See: surfactant. (05 Mar 2000) |