ball·point
noun/ˈbɔːlpɔɪnt/
/ˈbɔːlpɔɪnt/
(also ballpoint pen)
- a pen with a very small metal ball at its point, that rolls ink (= coloured liquid for writing, etc.) onto the paper
enlarge image圆珠笔；原子笔 Oxford Collocations DictionaryBallpoint is used before these nouns:- pen