ballpoint pen

US /ˈbɑːl.pɔɪnt ˌpen/
UK /ˈbɑːl.pɔɪnt ˌpen/
"ballpoint pen" picture
1.

a pen with a writing point that consists of a small metal ball that rotates in a socket and feeds ink from a reservoir

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Please sign the document with a ballpoint pen.
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I prefer writing with a ballpoint pen over a fountain pen.
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biroballpen
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ballpointpenpen palfountain penpen name