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tetrodotoxin Syllabification: te·tro·do·tox·in
Pronunciation: /teˌtrōdəˈtäksin/

Definition of tetrodotoxin in English:


A poisonous compound present in the ovaries of certain pufferfishes. It is a powerful neurotoxin.
Example sentences
  • Some gobies even rely on chemical protection, producing a poison called tetrodotoxin, which also occurs in pufferfishes and species of salamander.
  • The poison in fugu is neurotoxin tetrodotoxin and although it is not always fatal, it can cause an unpleasant death.
  • The liver and reproductive organs of the puffer fish contain tetrodotoxin, an extremely powerful nerve poison.


Early 20th century: from modern Latin Tetrodon (former genus name, from Greek tetra- 'fourfold' + odous, odont- 'tooth') + toxin.

Definition of tetrodotoxin in:
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