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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a gadget; dingus; thingumbob. |
strophoid (strō'foid') Pronunciation Key
(click for larger image in new window) The curve traced out by points P and P' which lie on lines through a fixed point A where the midpoint M of PP' is on a fixed line and the absolute value |PM| equals the absolute value |P'M| equals the absolute value |MO|, where O is the projection of A onto that fixed line. |