| posterior talar articular surface of calcaneus | Articulates with talus (subtalar joint) posterior to sinus tarsi. Synonym: facies articularis talaris posterior calcanei. (05 Mar 2000) |
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| cuboidal articular surface of calcaneus | The saddle-shaped surface on the anterior end of the calcaneus for articulation with the cuboid bone. Synonym: facies articularis cuboidea calcanei. (05 Mar 2000) |
| sacropelvic surface of ilium | The medial surface of the ilium behind and below the iliac fossa; it includes the iliac tuberosity, the auricular surface and the smooth pelvic surface below and in front of the auricular surface. Synonym: facies sacropelvina ossis ilii. (05 Mar 2000) |
| hepatitis B surface antigen | <virology> A serologic marker on the surface of the hepatitis B virus. The body will normally produce antibodies to hepatitis B surface antigen as part of the normal immune response to infection. It is the presence of antibodies to the hepatitis B surface antigen that are detected in a positive hepatitis B blood test. (27 Sep 1997) |
| hepatitis b surface antigens | Those hepatitis b antigens found on the surface of the dane particle and on the 20 nm spherical and tubular particles. Several subspecificities of the surface antigen are known. These were formerly called the Australia antigen. (12 Dec 1998) |
| pulmonary surface of heart | The lateral surface of the heart, directed toward the lungs; on the left it is principally the left ventricular wall; on the right it is the right atrial wall and the upper part of the right ventricular wall. Synonym: facies pulmonalis cordis. (05 Mar 2000) |
| smooth surface caries | Caries initiated on the smooth surfaces of teeth. (05 Mar 2000) |
| soil surface | The upper limits of the soil profile, for mineral soils, the upper limits of the highest mineral horizon (A-horizon), for organic soils, the upper limit of undecomposed organic matter. (09 Oct 1997) |
| 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) |
| 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) |