D defs.my
Entry 1 sense Webster, 1913

Knicker

/nĭk'-ẽr/ · Knick·er · IPA /ˈnɪkə(ɹ)/
01 n. A small ball of clay, baked hard and oiled, used as a marble by boys in playing.
  1. 1.
    A small ball of clay, baked hard and oiled, used as a marble by boys in playing.[Prov. Eng. & U. S.]