The Collaborative International Dictionary of English v.0.48:

Puffer \Puff"er\, n.
   1. One who puffs; one who praises with noisy or extravagant
      commendation.
      [1913 Webster]

   2. One who is employed by the owner or seller of goods sold
      at suction to bid up the price; a by-bidder. --Bouvier.
      [1913 Webster]

   3. (Zool.)
      (a) Any plectognath fish which inflates its body, as the
          species of Tetrodon and Diodon of the family
          Tetraodontidae; -- called also blower,
          puff-fish, swellfish, and globefish. They are
          highly poisonous due to the presence of glands
          containing a potent toxin, tetrodotoxin.
          Nevertheless they are eaten as a delicacy in Japan,
          being prepared by specially licensed chefs who remove
          the poison glands.
      (b) The common, or harbor, porpoise.
          [1913 Webster]

   4. (Dyeing) A kier.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Toxin \Tox"in\, Toxine \Tox"ine\, n. [Gr. toxiko`n. See Toxic.
   ]
   A poisonous product formed by an organism, such as a
   pathogenic bacterium, a plant or an animal, usually having a
   high molecular weight, often a protein or a polysaccharide,
   but occasionally a low-molecular weight agent such as
   tetrodotoxin.

The Collaborative International Dictionary of English v.0.48:

blowfish \blow"fish\ n.
   1. a fish eaten as a delicacy, especially in Japan. It is
      highly dangerous because of a potent nerve poison
      (tetrodotoxin) in its ovaries and liver. Chefs require
      special training to learn how to remove the poisonous
      parts, and in Japan they must be licensed.

   Note: In Japan it is called fugu. Deaths due to ingestion
         of the meat of this fish occur almost every year.

   Syn: sea squab, puffer, puffer fish.
        [WordNet 1.5 +PJC]

   2. any of numerous marine fishes of the family
      Tetraodontidae whose elongated spiny body can inflate
      itself with water or air to form a globe; several species
      contain tetrodotoxin, a potent nerve poison; they are
      closely related to spiny puffers.

   Syn: puffer, globefish.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

tetrodotoxin
    n 1: a powerful neurotoxin found in the ovaries of pufferfish