The Collaborative International Dictionary of English v.0.48:

Sea trumpet \Sea" trum"pet\
   1. (Bot.) A great blackish seaweed of the Southern Ocean,
      having a hollow and expanding stem and a pinnate frond,
      sometimes twenty feet long.
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   2. (Zool.) Any large marine univalve shell of the genus
      Triton. See Triton.
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The Collaborative International Dictionary of English v.0.48:

Trumpet \Trump"et\, n. [F. trompette, dim. of trompe. See
   Trump a trumpet.]
   1. (Mus.) A wind instrument of great antiquity, much used in
      war and military exercises, and of great value in the
      orchestra. In consists of a long metallic tube, curved
      (once or twice) into a convenient shape, and ending in a
      bell. Its scale in the lower octaves is limited to the
      first natural harmonics; but there are modern trumpets
      capable, by means of valves or pistons, of producing every
      tone within their compass, although at the expense of the
      true ringing quality of tone.
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            The trumpet's loud clangor
            Excites us to arms.                   --Dryden.
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   2. (Mil.) A trumpeter. --Clarendon.
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   3. One who praises, or propagates praise, or is the
      instrument of propagating it. --Shak.
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            That great politician was pleased to have the
            greatest wit of those times . . . to be the trumpet
            of his praises.                       --Dryden.
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   4. (Mach) A funnel, or short, fiaring pipe, used as a guide
      or conductor, as for yarn in a knitting machine.
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   Ear trumpet. See under Ear.

   Sea trumpet (Bot.), a great seaweed (Ecklonia buccinalis)
      of the Southern Ocean. It has a long, hollow stem,
      enlarging upwards, which may be made into a kind of
      trumpet, and is used for many purposes.

   Speaking trumpet, an instrument for conveying articulate
      sounds with increased force.

   Trumpet animalcule (Zool.), any infusorian belonging to
      Stentor and allied genera, in which the body is
      trumpet-shaped. See Stentor.

   Trumpet ash (Bot.), the trumpet creeper. [Eng.]

   Trumpet conch (Zool.), a trumpet shell, or triton.

   Trumpet creeper (Bot.), an American climbing plant (Tecoma
      radicans) bearing clusters of large red trumpet-shaped
      flowers; -- called also trumpet flower, and in England
      trumpet ash.

   Trumpet fish. (Zool.)
      (a) The bellows fish.
      (b) The fistularia.

   Trumpet flower. (Bot.)
      (a) The trumpet creeper; also, its blossom.
      (b) The trumpet honeysuckle.
      (c) A West Indian name for several plants with
          trumpet-shaped flowers.

   Trumpet fly (Zool.), a botfly.

   Trumpet honeysuckle (Bot.), a twining plant (Lonicera
      sempervirens) with red and yellow trumpet-shaped flowers;
      -- called also trumpet flower.

   Trumpet leaf (Bot.), a name of several plants of the genus
      Sarracenia.

   Trumpet major (Mil.), the chief trumpeter of a band or
      regiment.

   Trumpet marine (Mus.), a monochord, having a thick string,
      sounded with a bow, and stopped with the thumb so as to
      produce the harmonic tones; -- said to be the oldest bowed
      instrument known, and in form the archetype of all others.
      It probably owes its name to "its external resemblance to
      the large speaking trumpet used on board Italian vessels,
      which is of the same length and tapering shape." --Grove.

   Trumpet shell (Zool.), any species of large marine univalve
      shells belonging to Triton and allied genera. See
      Triton, 2.

   Trumpet tree. (Bot.) See Trumpetwood.
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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.
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         Have sight of Proteus rising from the sea,
         Or hear old Triton blow his wreathed horn.
                                                  --Wordsworth.
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   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.
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   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.
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