The Collaborative International Dictionary of English v.0.48:

Triton \Tri"ton\ (tr[imac]"t[o^]n), n. [L., fr. Gr. Tri`twn.]
   (Gr. Myth.)
   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.
   [1913 Webster]

         Have sight of Proteus rising from the sea,
         Or hear old Triton blow his wreathed horn.
                                                  --Wordsworth.
   [1913 Webster]

   2. (Zool.) Any one of many species of marine gastropods
      belonging to Triton and allied genera, having a stout
      spiral shell, often handsomely colored and ornamented with
      prominent varices. Some of the species are among the
      largest of all gastropods. Called also trumpet shell,
      and sea trumpet.
      [1913 Webster]

   3. (Zool.) Any one of numerous species of aquatic
      salamanders. The common European species are
      Hemisalamandra cristata, Molge palmata, and Molge
      alpestris, a red-bellied species common in Switzerland.
      The most common species of the United States is
      Diemyctylus viridescens. See Illust. under Salamander.
      [1913 Webster]