|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.|
autolysin au·tol·y·sin (ô-tŏl'ĭ-sĭn, ô'tə-lī'sĭn)
A substance, such as an enzyme, that is capable of destroying the cells or tissues of an organism within which it is produced. Also called autocytolysin.