† rha Obs.
[late L., a. Gr. ῥᾶ, said to be from the ancient name Ῥᾶ of the river Volga. See also rhabarbarum, rhapontic.]
Rhubarb.
| 1578 Lyte Dodoens iii. x. 329 Rha is hoate in the first degree, and dry in the second. 1597 Gerarde Herbal ii. lxxviii. 313 The root [of Bastard Rhubarb] is..verie like vnto the Rha of Barbarie. |