gynaecomastiaPronunciation: /ˌgʌɪnɪkə(ʊ)ˈmastɪə, gʌɪˈniːkə(ʊ)-, dʒ-/ (US gynecomastia)Definition of gynaecomastia noun [mass noun] Medicine enlargement of a man’s breasts, usually due to hormone imbalance or hormone therapy. gynaecomastia in other Oxford dictionaries Definition of gynaecomastia in the US English dictionary
