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neu·ro·tox·in -'täk-sən n a poisonous protein complex that acts on the nervous system
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neu·ro·tox·in (noorґo-tok″sin) a toxin that is poisonous to or destroys nerve tissue, especially the exotoxins secreted by Clostridium botulinum, C. tetani, Corynebacterium diphtheriae, and Shigella dysenteriae.Medical dictionary. 2011.