一ひと粒つぶ

noun

one grain; one drop; one bead

Counts a single small roundish object such as a grain of rice, a drop of liquid, a bead, or a pill. The reading ひとつぶ is the everyday form; いちりゅう is a rare Sino-Japanese reading used in some fixed contexts.

• お米こめを一ひと粒つぶも残のこさず食たべた。

  I ate every single grain of rice.

• この薬くすりは一ひと粒つぶでよく効きく。

  This medicine works well with just one pill.