orrho-


Also found in: Dictionary.

orrho-

Serum. See: sero-.
[G. orrhos, oros, whey, serum]

orrho-, oro-

prefix meaning "blood serum": orrhomeningitis, orrhoreaction, orrhorrhea.

orrho-

A little-used Greek root for serum, which has been replaced by the Latin equivalent, sero-; as in, “serous membrane”.