单词 rheotannic 释义 rheotannic, a. Chem.|ritnk|[f. Gr. ῥῆ rheum2 + tannic.]The name of a variety of tannic acid found in rhubarb.1883Encycl. Brit. XX. 530/1 The chief chemical constituents of Chinese rhubarb are chrysophan (C15H10O4), rheotannic acid...
