\Rhe"um\ (r[=e]"[u^]m), n. [NL., from L. Rha the river
Volga, on the banks of which it grows. See {Rhubarb}.] (Bot.)
A genus of plants. See {Rhubarb}.

\Rheum\ (r[udd]m), n. [OF. reume, rheume, F. rhume a
cold,, L. rheuma rheum, from Gr. ???, fr. "rei^n to flow,
akin to E. stream. See {Stream}, n., and cf. {Hemorrhoids}.]
(Med.)
A serous or mucous discharge, especially one from the eves or
nose.

      I have a rheum in mine eyes too.         --Shak.

{Salt rheum}. (Med.) See {Salt rheum}, in the Vocab.