D defs.my
Entry 1 sense Webster, 1913

Biro

· IPA /ˈbaɪ.ɹəʊ/
01 n. a pen with small metal ball as point of transfer of ink to paper; same as ballpoint pen.
  1. 1.
    a pen with small metal ball as point of transfer of ink to paper; same as ballpoint pen. See: ballpoint pen