A toxin is a naturally occurring poison [1] produced by metabolic activities of living cells or organisms. [2] They occur especially as proteins, often conjugated. [3]

Toxin, any substance poisonous to an organism. The term is sometimes restricted to poisons spontaneously produced by living organisms (biotoxins). Besides the poisons produced by such …

The meaning of TOXIN is a poisonous substance that is a specific product of the metabolic activities of a living organism and is usually very unstable, notably toxic when introduced into the tissues, and …

A poison that exists naturally in an insect or animal, and which is often introduced into the victim by biting or stinging, is known as a venom, while one in a plant is generally known as a toxin.

TOXIN definition: any poison produced by an organism, characterized by antigenicity in certain animals and high molecular weight, and including the bacterial toxins that are the causative agents of …

Jul 14, 2025 · A toxin is a poisonous substance produced within living cells or organisms. These substances are distinct from toxicants, which are synthetic chemicals like pesticides.

May 19, 2025 · Most toxins that cause problems in humans come from germs such as bacteria. For example, the symptoms of cholera are caused by a toxin made by cholera bacteria. Other toxins that …

Definition of toxin noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Jul 11, 2025 · Toxicologist say that what makes a toxin depends on dose and exposure. Experts share tips to stay safe from harm—and from misinformation.

Define toxin. toxin synonyms, toxin pronunciation, toxin translation, English dictionary definition of toxin. n. 1. A poisonous substance, especially a protein, that is produced by living cells or organisms and is …