臼うす玉だま

noun

discoidal bead; pierced jade bead

Archaeological term for a type of bead from the Kofun period, often made of jade or similar stone, with a hole through the center.

• この古こ墳ふんからは臼うす玉だまが多た数すう出しゅつ土どした。

  Many discoidal beads were excavated from this kofun.