a question uttered by a listener that in effect repeats a speaker's sentence, replacing an unclear or doubted portion of the sentence with a stressed interrogative word, as You said WHAT to John? or He WHAT?
a mark (‸) made in written or printed matter to show the place where something is to be inserted.
a symbol (∼) indicating equivalency or similarity between two values.
a short oblique stroke (/) between two words indicating that whichever is appropriate may be chosen to complete the sense of the text in which they occur: