Gynecomastia

//ˌɡaɪ.nɪ.kəʊˈmæs.tɪə// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Excessive development of breasts in men, resembling the breast development in women. US, countable, uncountable

    "But probably the primary reason for gynecomastia in adult onset is drugs—and these are not illegal drugs."

  2. 2
    excessive development of the breasts in males; usually the result of hormonal imbalance or treatment with certain drugs (including some antihypertensives) wordnet

Example

More examples

"But probably the primary reason for gynecomastia in adult onset is drugs—and these are not illegal drugs."

Etymology

Internationalism. From gyneco- + -mastia.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.