粒子any small, round, bead-like object

• 颗大粒饱

  large-grained

• 这个玉米棒上有多少颗粒？

  How many grains of corn are there on this ear of maize?

一粒粮食grain

• 颗粒无收

  have total crop failure

• 颗粒归仓

  harvest every last grain

【地质；摄】granule