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A poison or poisonous agent.
Poisonous; toxic.


1. a toxic substance; poison
2. a rare word for intoxicant
poisonous; toxic
[C19: from Medieval Latin toxicāre to poison; see toxic]


(ˈtɒk sɪ kənt)

1. poisonous; toxic.
2. a poison.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.toxicant - any substance that causes injury or illness or death of a living organismtoxicant - any substance that causes injury or illness or death of a living organism
substance - a particular kind or species of matter with uniform properties; "shigella is one of the most toxic substances known to man"
atropine - a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides
hyoscyamine - a poisonous crystalline alkaloid (isometric with atropine but more potent); used to treat excess motility of the gastrointestinal tract
toxin - a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
Adj.1.toxicant - having the qualities or effects of a poisontoxicant - having the qualities or effects of a poison
toxic - of or relating to or caused by a toxin or poison; "suffering from exposure to toxic substances"


Capable of injuring or killing by poison:
References in periodicals archive ?
Environmental Toxicants are the toxic substances in the environment.
24 (ANI): Turns out, switching from smoking to glo significantly reduces exposure to toxicants.
The twenty-five selections that make up the main body of the text are devoted to the measurements of toxicants and toxicity, food chemical carcinogens, absorption of food toxicants, an overview of food allergies in children and adults, and a wide variety of other related subjects.
The chapter continues to present the effects of toxicants on reproductive systems and embryonic development.
He was nominated as an expert for FAO's JECFA meetings on food additives, contaminants and natural toxicants (2012 -2016).
A meta-analysis--a mathematical summary of previously published data--led by the University of Pittsburgh (Pa.) School of Medicine shows that hookah smokers are inhaling a large load of toxicants.
A new meta-analysis shows that hookah smokers are inhaling a large load of toxicants.
Since numerous PD-risk factors, including positive family history, toxicants exposure, and personal habits, have been identified [5, 6, 9], specific efforts should be made to further define the PD-risk status and, consequently, improve inclusion criteria for neuroprotective treatments.
These carbonaceous particles are likely to undergo secondary reactions with metals, toxicants, or other compounds.
He introduces the principles of toxicology at the molecular, cellular, and organism levels, and the most important food-borne toxicants, such as endogenous plant toxicants; geochemical pollutants that plants absorb from the soil; environmental pollutants; mycotoxins; animal endogenous poisons; toxicants from aquatic animals; pesticide residues; veterinary drugs and feed additives; toxicants formed during processing, storage, and digestion; food additives; and vitamins.
Over 2,700 new citations identify previously unknown toxicants and provide all the technical details, while information on plant morphology and disease clinical signs brings together a range of ideas and approaches blending information sources for small and exotic animal practices.
PCBs are long-lasting toxicants that accumulate in fatty tissues and remain prevalent in the bodies of people and wildlife around the world, despite a ban decades ago.