Triton

 
Pronunciation: /ˈtrʌɪt(ə)n/
  • 1 Greek Mythology a minor sea god usually represented as a man with a fish’s tail and carrying a trident and shell-trumpet.
  • 2 Astronomy the largest satellite of Neptune, the seventh closest to the planet and having a retrograde orbit and a thin nitrogen atmosphere, discovered in 1846 (diameter 2,700 km).