Yours, Etc.: Origins and Uses of 8 Sign-Offs
c.1200, from Old French scorpion (12c.), from Latin scorpionem (nominative scorpio), extended form of scorpius, from Greek skorpios "a scorpion," from PIE root *(s)ker- "to cut" (see shear (v.)). The Spanish alacran "scorpion" is from Arabic al-'aqrab.