This is the last of the Omar-related flavor/educational reviews. I decided to do these, not only because I love the flavor and references within this game, in general, but because I'm becoming an Omar fanboy. Anywho...
An Obelus, more commonly referred to as a division sign, comes from an Ancient Greek word for a sharpened stick or pointed pillar. Interestingly, before its mathematical implications, this sign was used in texts to mark passages believed to be corrupted or false. Such passages were marked as such to be deleted, or censored, in line with the conspiracy theme. Seems to fit fairly well with Omar.