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The Collaborative International Dictionary
Mastodynia

Mastodynia \Mas`to*dyn"i*a\, Mastodyny \Mas*tod"y*ny\, n. [NL. mastodynia, fr. Gr. masto`s the breast + ? pain.] (Med.) Pain occuring in the mamma or female breast, -- a form of neuralgia.

Wiktionary
mastodynia

n. (context medicine English) mastalgia; pain in the breast