1. 
   Tetrodon
   Tet'ro·don noun [ Tetra- + Greek ..., ..., tooth.] (Zoology) Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth. [ Written also...
   Found op http://www.encyclo.co.uk/webster/T/35
   
   
2. 
   tetrodon
   <zoology> Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth. ... Alternative forms: tetradon. ... The skin is usually spinous, and the belly is capable of being greatly distended by air o...
   Found op http://www.mondofacto.com/facts/dictionary?tetrodon
   
   
3. 
   Tetrodon
   • (n.) Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth.
   Found op http://thinkexist.com/dictionary/meaning/tetrodon/
   
   

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