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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a scrap or morsel of food left at a meal. |
| Christmas disease | |
| —n | |
| a relatively mild type of haemophilia, caused by lack of a protein (Christmas factor) implicated in the process of blood clotting | |
| [C20: named after S. Christmas, the first patient suffering from the disease who was examined in detail] | |
Christmas disease Christ·mas disease (krĭs'məs)
n.
See hemophilia B.