noun Pharmacology.
  1. a neurotoxin, C11H17N3O3, occurring in a species of puffer fish: ingestion of the toxin is usually rapidly fatal due to heart failure or asphyxiation; used experimentally to block impulse conduction potential in excitable cells.

Origin of tetrodotoxin

1910–15; < New Latin Tetrodo(n) genus name of the puffer fish (see tetr-, -odont) + toxin
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British Dictionary definitions for tetrodotoxin


  1. a highly lethal neurotoxin found in certain puffer fish and in newts of the genus Taricha . Formula: C 11 H 17 N 3 O 3

Word Origin for tetrodotoxin

C20: from New Latin Tetrodon (puffer fish genus name, from Greek tetra- fourfold + odont- tooth) + toxin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

tetrodotoxin in Medicine


  1. A potent neurotoxin, found in many puffer fish and certain newts.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.