ballpoint pen

• ball-point pen

From ballpoint +‎ pen. Compare Dutch balpen (“ballpoint pen”).

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ballpoint pen (plural ballpoint pens)

2. A pen, similar in size and shape to a pencil, having an internal chamber filled with a viscous, quick-drying ink that is dispensed at the tip during use by the rolling action of a metal sphere (around 0.7 mm to 1 mm in diameter).

   Synonyms: ballpoint (ellipsis), ball pen, ballpen, biro (Commonwealth)

   Hypernyms: pen < implement

   Coordinate terms: dip pen, nib pen, fountain pen, stylographic pen; gel pen

• ballpoint pen on Wikipedia.Wikipedia
• List of pen types, brands and companies on Wikipedia.Wikipedia