What is the meaning of Obelus?

A symbol resembling a horizontal line (), sometimes together with one or two dots (for example, or ÷), which was used in ancient manuscripts and texts to mark a word or passage as doubtful or spurious, or redundant; an obelisk.

A dagger symbol (), which is used in printed matter as a reference mark to refer the reader to a footnote, marginal note, etc.; beside a person's name to indicate that the person is deceased; or beside a date to indicate that it is a person's death date; an obelisk.

obelisk (diacritical mark)

Source: wiktionary.org