a form of financial aid awarded to a student studying for a graduate degree at a college or university in which the student assists a professor, usually in academic or laboratory work.
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.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.