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1. poisonous.
2. poison.
developmental toxicant teratogen.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


1. Synonym(s): poisonous
2. Any poisonous agent, specifically an alcohol or other poison, causing symptoms of what is popularly called intoxication.
Farlex Partner Medical Dictionary © Farlex 2012


A poison or poisonous agent.
Poisonous; toxic.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


1. Having the power to intoxicate.
2. An intoxicating agent, such as alcohol.
Synonym(s): toxicant.


1. A noxious or poisonous substance that is formed or elaborated as an integral part of the cell or tissue, as an extracellular product (exotoxin), or as a combination of the two during the metabolism and growth of certain microorganisms and some higher plant and animal species.
2. A common misnomer for poison.
[G. toxikon, poison]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
We found, in both cases and controls, occupational exposure as main cause of toxicants exposure (PD: occupational = 77.3%, environmental = 22.7%; controls: occupational 81.6%; environmental = 18.4%; p = n.s.).
Toxic substances may be systemic toxicants or organ toxicants.
They fight it with various toxicants, including chlorine and potassium salts.
Creosote was the only toxicant that affected the frequencies of hemocyte subpopulations in tunicates exposed to toxicants in aquaria [ILLUSTRATION FOR FIGURE 5 OMITTED].
Gold nanoparticles create red color after combining with the toxicant and the color is visible by naked eye too.
Several decades have been spent researching the nature of tobacco smoke, identifying key toxicants and developing technologies to reduce the levels of some toxicants in smoke.
However, DEHP in neonates is a special concern because "it is a reproductive and developmental toxicant in laboratory animals," says study author Russ Hauser of the Harvard School of Public Health in Boston.
Previous research indicates that many toxicants can increase cells' oxidative status, but questions remain as to how this shared ability relates to toxicant function.
They rank each toxicant in terms of toxicity, exposure, and risk on a scale of 0 to 100, and this helps put the relative risk of this diverse group of agents in perspective.
Last year, an American Academy of Pediatrics report designated mercury a major environmental toxicant that "should not be present in the home or other environments of children: It explicitly identified old fever thermometers as a source.
The likelihood of exposure to environmental toxicants increases in most economically disadvantaged communities and is associated with an excess disease burden in these communities."