| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a chattering or flighty, light-headed person. |
gallop gal·lop (gāl'əp)
n.
A triple cadence to the heart sounds at rates of 100 beats per minute or more due to an abnormal third or fourth heart sound being heard in addition to the first and second sounds. Also called cantering rhythm, gallop rhythm.