fountain pen
  自來水筆
  Pen n.
  1. A feather. [Obs.]
  2. A wing. [Obs.]
  3. An instrument used for writing with ink, formerly made of a reed, or of the quill of a goose or other bird, but now also of other materials, as of steel, gold, etc. Also, originally, a stylus or other instrument for scratching or graving.
     Graven with an iron pen and lead in the rock.   --Job xix. 24.
  4. Fig.: A writer, or his style; as, he has a sharp pen. “Those learned pens.”
  5. Zool. The internal shell of a squid.
  6.  Zool. A female swan; -- contrasted with cob, the male swan. [Prov. Eng.]
  Bow pen. See Bow-pen.
  Dotting pen, a pen for drawing dotted lines.
  Drawing pen, 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 Zool., a pennatula. [Usually written sea-pen.]
  Foun·tain n.
  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 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.
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  fountain pen
       n : a pen that is supplied with ink from a reservoir in its
           barrel