Source : Webster's Revised Unabridged Dictionary (1913)

   {Bow pen}. See {Bow-pen}.

   {Dotting pen}, a pen for drawing dotted lines.

   {Drawing}, or {Ruling}, {pen}, a pen for ruling lines having
      a pair of blades between which the ink is contained.

   {Fountain pen}, {Geometric pen}. See under {Fountain}, and
      {Geometric}.

   {Music pen}, a pen having five points for drawing the five
      lines of the staff.

   {Pen and ink}, or {pen-and-ink}, executed or done with a pen
      and ink; as, a pen and ink sketch.

   {Pen feather}. A pin feather. [Obs.]

   {Pen name}. See under {Name}.

   {Sea pen} (Zo["o]l.), a pennatula. [Usually written
      {sea-pen}.]

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.

   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.

   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.

   4. The source from which anything proceeds, or from which
      anything is supplied continuously; origin; source.

            Judea, the fountain of the gospel.    --Fuller.

            Author of all being, Fountain of light, thyself
            invisible.                            --Milton.

   {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} (Zo["o]l.), 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.

Source : WordNet®

fountain pen
     n : a pen that is supplied with ink from a reservoir in its
         barrel