1655-65; < Late Latintoxicus poisonous, adj. derivative of Latintoxicum poison < Greektoxikón (orig. short for toxikòn phármakon literally, bow poison, i.e., poison used on arrows), equivalent to tóx(on) bow + -ikon, neuter of -ikos-ic
1664, from Fr. toxique, from L.L. toxicus "poisoned," from L. toxicum "poison," from Gk. toxikon (pharmakon) "(poison) for use on arrows," from toxikon, neut. of toxikos "pertaining to arrows or archery," and thus to a bow, from toxon "bow," probably from a Scythain word that also was borrowed into L. as taxus "yew."