芥子粒 けしつぶ Also written ケシ粒 Meanings Noun poppy seed See also: けしの実 (けしのみ). something extremely tiny (often 〜ほど or 〜のよう) Kanji 芥 mustard; rape; dust. Read as ケ. 子 child 粒 grain. Read as つぶ. Jinuma: Japanese Dictionary · Word lists