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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
lysin ly·sin (lī'sĭn)
n.
An antibody that is capable of causing the destruction or dissolution of red blood cells, bacteria, or other cellular elements.
A substance that causes lysis.