| relief [ri`lēf] CRYSTALLOGRAPHY The apparent topography exhibited by minerals in thin section as a consequence of refractive index. GEODESY The configuration of a part of the earth's surface, with reference to altitude and slope variations and to irregularities of the land surface. MECHANICAL ENGINEERING 1. A passage made by cutting away one side of a tailstock center so that the facing or parting tool may be advanced to or almost to the center of the work. 2. Clearance provided around the cutting edge by removal of tool material. |