Definitions for "Ballpoint pen"
A pen that has a disposable refill unit consisting of a metal tube containing a thick, greasy, slow-drying ink, with a tiny textured ball at the writing end. Ink is picked up by the ball and tranferred to the paper.
a pen that has a small metal ball as the point of transfer of ink to paper
a pen that uses a small rotating ball made of brass, steel or tungsten carbide to disperse ink as you write
a good marker)