| 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. |
| air embolism or aeroembolism | |
| —n | |
| See decompression sickness the presence in the tissues and blood of a gas, such as air or nitrogen bubbles, caused by an injection of air or, in the case of nitrogen, by an abrupt and substantial reduction in the ambient pressure | |
| aeroembolism or aeroembolism | |
| —n | |