大黄 だいおう Also written ダイオウ Meanings Noun Chinese rhubarb (Rheum officinale); rhubarb root (used in traditional Chinese medicine) Kanji 大 big. Read as ダイ. 黄 yellow. Read as オウ. Words containing 大黄 唐大黄 (からだいおう) rhubarb (Rheum undulatum) Jinuma: Japanese Dictionary · Word lists