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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a fool or simpleton; ninny. |
| Riemannian geometry | |
| —n | |
| Also called: elliptic geometry a branch of non-Euclidean geometry in which a line may have many parallels through a given point. It has a model on the surface of a sphere, with lines represented by great circles | |
| Riemannian geometry (rē-män'ē-ən) Pronunciation Key
A non-Euclidean system of geometry based on the postulate that within a plane every pair of lines intersects. |