Pronunciation IPA (key): /ˈmæməri/ Audio (UK)(file) Adjective Positive mammary Comparative none Superlative none (biology) If something is mammary, it is related to the breast of a woman or a female animal. Noun Singular mammary Plural mammaries (countable) A mammary is the milk-secreting organ of female mammal. Synonym: mammaWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads