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1 A neurotoxin is a toxic agent or substance that inhibits, damages or destroys the tissues of the nervous system, especially neurons, the conducting cells of your body's central nervous system. 2  This is an example of a cytotoxin.
neuÂ·roÂ·genÂ·ic. adj. 1. Originating in the nerves or nervous tissue: a neurogenic tumor. 2. Caused or affected by the nerves or nervous system: neurogenic disorders. neuâ²roÂ·genâ²iÂ·calÂ·ly adv.