The Collaborative International Dictionary of English v.0.48:

Fountain \Foun"tain\ (foun"t[i^]n), n. [F. fontaine, LL.
   fontana, fr. L. fons, fontis. See 2d Fount.]
   1. A spring of water issuing from the earth.
      [1913 Webster]

   2. An artificially produced jet or stream of water; also, the
      structure or works in which such a jet or stream rises or
      flows; a basin built and constantly supplied with pure
      water for drinking and other useful purposes, or for
      ornament.
      [1913 Webster]

   3. A reservoir or chamber to contain a liquid which can be
      conducted or drawn off as needed for use; as, the ink
      fountain in a printing press, etc.
      [1913 Webster]

   4. The source from which anything proceeds, or from which
      anything is supplied continuously; origin; source.
      [1913 Webster]

            Judea, the fountain of the gospel.    --Fuller.
      [1913 Webster]

            Author of all being,
            Fountain of light, thyself invisible. --Milton.
      [1913 Webster]

   Air fountain. See under Air.

   Fountain heead, primary source; original; first principle.
      --Young.

   Fountain inkstand, an inkstand having a continual supply of
      ink, as from elevated reservoir.

   Fountain lamp, a lamp fed with oil from an elevated
      reservoir.

   Fountain pen, a pen with a reservoir in the handle which
      furnishes a supply of ink.

   Fountain pump.
      (a) A structure for a fountain, having the form of a pump.
      (b) A portable garden pump which throws a jet, for
          watering plants, etc.

   Fountain shell (Zool.), the large West Indian conch shell
      (Strombus gigas).

   Fountain of youth, a mythical fountain whose waters were
      fabled to have the property of renewing youth.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Conch \Conch\ (k[o^][ng]k), n. [L. concha, Gr. ko`gchh. See
   Coach, n.]
   1. (Zool.) A name applied to various marine univalve shells;
      esp. to those of the genus Strombus, which are of large
      size. Strombus gigas is the large pink West Indian
      conch. The large king, queen, and cameo conchs are of the
      genus Cassis. See Cameo and cameo conch.
      [1913 Webster]

   Note: The conch is sometimes used as a horn or trumpet, as in
         fogs at sea, or to call laborers from work.
         [1913 Webster]

   2. In works of art, the shell used by Tritons as a trumpet.
      [1913 Webster]

   3. [often capitalized] One of the white natives of the Bahama
      Islands or one of their descendants in the Florida Keys;
      -- so called from the commonness of the conch there, or
      because they use it for food.
      [1913 Webster]

   4. (Arch.) See Concha, n.
      [1913 Webster]

   5. The external ear. See Concha, n., 2.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Strombus gigas
    n 1: a large variety of conch [syn: giant conch, Strombus
         gigas]