rhubarb (Rheum undulatum)
Rare term for a specific rhubarb species; in everyday Japanese, ルバーブ is the standard word for rhubarb.
See also: ルバーブ
唐大黄 is a type of rhubarb sometimes used in traditional Chinese medicine.
Compound of 唐 (kara, 'Tang; China') and 大黄 (daiō, 'rhubarb'), referring to a rhubarb species associated with China.