Meaning of POISON in English

POISON

I

Any substance (natural or synthetic) that, at a certain dosage, damages living tissues and injures or kills.

Poisons spontaneously produced by living organisms are often called toxin s, venom s if produced by animals. Poisons may be ingested, inhaled, injected, or absorbed through the skin. They do not always have an all-or-none effect; degrees of poisoning may occur, and at a given dose some substances are far more toxic than others (e.g., a pinch of potassium cyanide can kill, whereas a single dose of ordinary table salt must be massive to kill). Poisoning may be acute (a single dose does significant damage) or chronic (repeated or continuous doses produce an eventual effect, as with chemical carcinogen s). The effects produced by poisons may be local (hives, blisters, inflammation) or systemic (hemorrhage, convulsions, vomiting, diarrhea, clouding of the senses, paralysis, respiratory or cardiac arrest). Agricultural pesticide s are often poisonous to humans. Some industrial chemicals can be very toxic or carcinogenic. Most therapeutic drugs and health-care products can be poisons if taken inappropriately or in excess. Most forms of radiation can be toxic (see radiation injury ). See also antidote ; arsenic poisoning ; fish poisoning ; food poisoning ; lead poisoning ; mercury poisoning ; mushroom poisoning .

II

[c mediumvioletred] (as used in expressions)

poison hemlock

poison ivy

poison oak

poison sumac

poison elder

blood poisoning

arsenic poisoning

drug poisoning

medicinal poisoning

fish poisoning

food poisoning

lead poisoning

mercury poisoning

mushroom poisoning

{{link=toadstool poisoning">toadstool poisoning

Britannica English dictionary.      Английский словарь Британика.