|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
Galvani Gal·va·ni (gāl-vä'nē, gäl-), Luigi. 1737-1798.
Italian physiologist and physician who asserted that animal tissues generate electricity. Although proved wrong, his work stimulated research on electricity.