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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| 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. |
involucrum in·vo·lu·crum (ĭn'və-l&oomacr;'krəm)
n. pl. in·vo·lu·cra (-krə)
An enveloping sheath or membrane, such as the sheath of new bone that forms around a sequestrum.