[ jin-i-koh-mas-tee-uh, gahy-ni-, jahy-ni- ]
/ ˌdʒɪn ɪ koʊˈmæs ti ə, ˌgaɪ nɪ-, ˌdʒaɪ nɪ- /


abnormal enlargement of the breast in a male.
Also gyn·e·co·mas·ty [jin-i-kuh-mas-tee, gahy-ni-, jahy-ni-] /ˈdʒɪn ɪ kəˌmæs ti, ˈgaɪ nɪ-, ˈdʒaɪ nɪ-/.

Origin of gynecomastia

From New Latin, dating back to 1880–85; see origin at gyneco-, mast-, -ia Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for gynecomastia

  • Gynecomastia or hypertrophy of the mammæ is still more frequent in male criminals.

    Criminal Man|Gina Lombroso-Ferrero

Medical definitions for gynecomastia

[ gī′nĭ-kō-măstē-ə, jĭn′ĭ- ]


Abnormal enlargement of the male mammary glands, sometimes to the point of secreting milk.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.