Pathology. inflammation of a mucous membrane, especially of the respiratory tract, accompanied by excessive secretions.
Origin of catarrh
1350–1400;Middle English < Late Latincatarrhus < Greekkatárrous literally, down-flowing, equivalent to katarr(eîn) to flow down (kata-cata- + rheîn to flow) + -ous, variant of -eos (theme vowel + adj. suffix)
Related formsca·tarrh·al, ca·tarrh·ous, adjectiveca·tarrh·al·ly, adverbnon·ca·tar·rhal, adjectivepost·ca·tarrh·al, adjective
late 14c., from Medieval Latin catarrus, from Late Latin catarrhus, from Greek katarrhous "a catarrh, a head cold," literally "a flowing down," earlier kata rrhoos, ultimately from kata- "down" (see cata-) + rhein "to flow" (see rheum). Related: Catarrhalcatarrhous.