Borrowed from French toxique, from Late Latin toxicus (“poisoned”), from Latin toxicum (“poison”), from Ancient Greek τοξικόν (toxikón) [φάρμακον (phármakon)] ("poison for use on arrows"), from τοξικός (toxikós, “pertaining to arrows or archery”), from τόξον (tóxon, “bow”).
- (toxicology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.
- (figuratively) Negative; harmful.
- a toxic environment that promoted bullying
- (medicine) Appearing grossly unwell; characterised by serious, potentially life-threatening compromise in the respiratory, circulatory or other body systems.
- The child appeared toxic on arrival at the hospital.
- toxic in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- “toxic” in Douglas Harper, Online Etymology Dictionary, 2001–2018.