Boanthropy

A rare form of insanity, written of in the nineteenth century, in which a man imagines himself to be an ox. Such madness (or at least its diagnosis) is found in the Bible in the book of Daniel, which reports that King Nebuchadnezzar “was driven from men, and did eat grass as oxen, and his body was wet with the dew of heaven.” The same Greek prefix bo as in bovine, was used in other words, such as boopic, “having prominent eyes like an ox.”

Jeffery Kacirk, Forgotten English Knowledge Cards. Pomegranate.