noun
Astronomy term for a small, bright, convective cell on the Sun's photosphere.
太陽の表面に見られる粒状斑は、対流によって生じる。
Granules seen on the Sun's surface are caused by convection.
Compound of 粒状 (granular) + 斑 (spot, patch). The term is a direct translation of the English astronomical term 'granule'.