orrho-
(bef. a vowel orrh-), comb. form of Gr. ὀρρό-ς serum, in a few rarely used terms of pathology, etc., as ˈorrhocyst, -ˈcystis, a serous cyst; orrhymeˈnitis, inflammation of a serous membrane; also, ˈorrhoid a., of the appearance or nature of serum (Mayne Expos. Lex. 1857); ˈorrhous a., serous (Syd. Soc. Lex. 1892).