rheotannic, a. Chem.
(riːəʊˈtænɪk)
[f. Gr. ῥῆον rheum2 + tannic.]
The name of a variety of tannic acid found in rhubarb.
| 1883 Encycl. Brit. XX. 530/1 The chief chemical constituents of Chinese rhubarb are chrysophan (C15H10O4), rheotannic acid (C20H26O14) [etc.]. |