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noun Physics.
  1. a positively-charged particle consisting of a proton and two neutrons, equivalent to the nucleus of an atom of tritium.
Compare deuteron.

Origin of triton

1930–35; < Greek tríton, neuter of trítos third, equivalent to trí- tri- + -ton neuter adj. suffix; cf. -on1


  1. Classical Mythology. a son of Poseidon and Amphitrite, represented as having the head and trunk of a man and the tail of a fish, and as using a conch-shell trumpet.
  2. Astronomy. a moon of Neptune.
  3. (lowercase) any of various marine gastropods of the family Cymatiidae, having a large, spiral, often beautifully colored shell.
  4. (lowercase) the shell of a triton.
Related formsTri·ton·ic [trahy-ton-ik] /traɪˈtɒn ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for triton

Contemporary Examples

Historical Examples

  • Then the Triton grew enraged, leaped up and struck at Notscha with his ax.

  • The armlet struck the Triton on the head and he sank down dead.

  • And a watchman also came and reported that the Triton had been slain by a boy.

  • But he did not drown, for a Triton came his way who took him along with him to the dragon-castle.

  • Art a maid of the waters, One of shell-winding Triton's bright-hair'd daughters?


    John Keats

British Dictionary definitions for triton


  1. any of various chiefly tropical marine gastropod molluscs of the genera Charonia, Cymatium, etc, having large beautifully-coloured spiral shells

Word Origin

C16: via Latin from Greek tritōn


  1. physics a nucleus of an atom of tritium, containing two neutrons and one proton

Word Origin

C20: from trit (ium) + -on


noun Greek myth
  1. a sea god, son of Poseidon and Amphitrite, depicted as having the upper parts of a man with a fish's tail and holding a trumpet made from a conch shell
  2. one of a class of minor sea deities


  1. the largest satellite of the planet Neptune. Diameter: 2700 km
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

Word Origin and History for triton


minor sea god, son of Poseidon and Amphitrite, from Greek Triton, cognate with Old Irish triath (genitive trethan) "sea."

Online Etymology Dictionary, © 2010 Douglas Harper