A form of pleonasm that, as our Dictionary says, unnecessarily repeats terms of equal meaning. It is related to bathology and perisology. It seems that the term is due to a Persian general who, according to some historian, died in the Battle of Marathon in the First Medical War. His name was Datis and it seems that he had this expressive hobby.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list
