| ostomy | An operation to create an opening from an area inside the body to the outside. See glossary entry for colostomy. (12 Dec 1998) |
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| baseplate | <cell biology> A hypothetical cell adhesion molecule possibly involved in sponge cell adhesion, existence unproven. (18 Nov 1997) |
| baseplate wax | A hard pink wax used in dentistry for making occlusion rims. (05 Mar 2000) |
| stabilised baseplate | A baseplate lined with plastic material to improve its fit and stability. (05 Mar 2000) |
| convex | Applied to a surface that is evenly curved outward, the segment of a sphere. Origin: L. Convexus, vaulted, arched, convex, fr. Con-veho, to bring together (05 Mar 2000) |
| convex lens | A converging lens. Synonym: plus lens. (05 Mar 2000) |
| convex mirror | A spherical reflecting surface that constitutes a segment of the exterior of a sphere. (05 Mar 2000) |
| high convex | The segment of a sphere of short radius. (05 Mar 2000) |
| double convex lens | A lens with both surfaces convex. Synonym: convexoconvex lens, double convex lens. (05 Mar 2000) |
| low convex | The segment of a sphere of long radius. (05 Mar 2000) |