Definition of mastodynia in US English:

mastodynia

(also mastodyny)

noun

Medicine
  • Pain in one or both breasts; = mastalgia.

Origin

Early 19th century; earliest use found in Medical and Physical Journal. From post-classical Latin mastodynia from masto- + -odynia.

Pronunciation

mastodynia

/ˌmastəˈdɪnɪə/