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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| Main Entry: | biological magnification |
| Part of Speech: | n |
| Definition: | the process by which the concentration of toxic substances increases in each successive link in the food chain; also called biomagnification |
| Example: | In biological magnification, pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans. |
| Main Entry: | biological magnification |
| Part of Speech: | n |
| Definition: | See biomagnification |