|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.|
|estimated time of arrival|
eta e·ta (ā'tə, ē'tə)
Symbol η The seventh letter of the greek alphabet.