I. ˈtäksə̇kənt, -sēk- noun
( -s )
Etymology: toxic (I) + -ant
: an agent or a substance that acts as a poison ; especially : a preparation for insect control that kills rather than repels
II. adjective
Etymology: Medieval Latin toxicant-, toxicans, present participle of toxicare to poison, from Latin toxicum poison
: producing a toxic effect : poisonous