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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 ?
They then infected mouse liver cells with the modified HIV and monitored the extent to which the virus turned CAT on when the cells were exposed to a range of toxicants.
The measure is authorized under California's Proposition 65, which requires that consumers be warned of toxicants in the products they buy; it is the first to mandate multilingual warnings.
Even if the animals excreted such chemicals completely, they point out, the toxicants might still pose an environmental hazard if they were transferred to soil through manure.
The Dutch study has been tracking various impacts of exposure to these toxicants on a group of children since 1990.
The PM can be used to fingerprint cell lines used in research or bio-manufacturing to ensure stability; or monitor the effects of drugs or toxicants on cells.
toxicants," including those capable of altering DNA, Bercz concludes.
The proprietary modeling capability works by identifying common toxicity markers, which are genes responsible for toxic responses as measured by studies conducted on thousands of samples treated with known toxicants.
Exposure to environmental toxicants that disrupt sperm production (spermatogenesis) or the function of reproductive hormones or sperm may increase the risk of male infertility.
The new data might also explain some animal and human studies showing developmental or neurological problems among the offspring of males exposed to drugs, alcohol or other environmental toxicants, such as lead, he adds.
Classic toxicants were used for dosing in order to evaluate various mechanisms of toxic activity, types of tissue damage, and therapeutic action.
Flies lacking the DJ-1 gene showed selective sensitivity to widely used agricultural toxicants that kill neurons mainly through oxidative stress.
TCDD's stimulation of P450 production might therefore indirectly increase levels of other toxicants in the body.