noun (n)

• (Greek mythology) a sea god; son of Poseidon(noun.person)

  source: wordnet30
• the largest moon of Neptune(noun.object)

  source: wordnet30
• tropical marine gastropods having beautifully colored spiral shells(noun.animal)

  source: wordnet30
• small usually bright-colored semiaquatic salamanders of North America and Europe and northern Asia(noun.animal)

  Synonym:
  newt
  

  source: wordnet30
• A fabled sea demigod, the son of Neptune and Amphitrite, and the trumpeter of Neptune. He is represented by poets and painters as having the upper part of his body like that of a man, and the lower part like that of a fish. He often has a trumpet made of a shell.(noun)

  source: webster1913