obelus

A symbol consisting of a line with dots above and below (÷) used to represent the mathematical division operation. Originally, this sign (or a plain line) was used in ancient manuscripts to mark passages that were suspected of being corrupted or spurious. The word comes from the Greek word for a sharpened stick, spit, or pointed pillar--the same root as that of "obelisk." Obelus is sometimes used to refer to another symbol usually known as a dagger.