a class of words or forms in a given language that have one or more grammatical features in common, as, in Latin, all masculine nouns in the nominative singular, all masculine singular nouns, all masculine nouns, or all nouns.
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 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:
