|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
concavity con·cav·i·ty (kŏn-kāv'ĭ-tē)
A hollow or depression that is curved like the inner surface of a sphere.