|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|conservation of charge|
|the principle that the total charge of any isolated system is constant and independent of changes that take place within the system|
|conservation of charge
A conservation law stating that the total electric charge of a closed system remains constant over time, regardless of other possible changes within the system.