-rrhea WORD ORIGIN a combining form meaning “flow,” “discharge,” used in the formation of compound words: gonorrhea.
Also. Compare . Origin of -rrhea New Latin -rrhoea Greek -rrhoia, combining form representing rhoía a flow, akin to rheîn to flow, Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 -rrhea in Medicine -rrhea suff. Flow; discharge:seborrhea. The American Heritage® Stedman’s Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.