hmo hmg-coa reductase • hmong · · · Info · Definitions · Synonyms · Characters · · hmo · · Text Latin · · Script 3 · · Length 1 · · Syllables Definitions · · · (noun) group insurance that entitles members to services of participating hospitals and clinics and physicians. Synonyms: health maintenance organization, HMO. · · Noun Definition 1 Synonyms · · · health maintenance organization · · Synonym 1 Characters · · h latin small letter h U+0068 m latin small letter m U+006D o latin small letter o U+006F