mamma
Word family
Synonym discussion
Sense: noun/1
Breast is the everyday word used in casual conversation, healthcare settings, and general writing — it covers both the anatomical structure and the external body part. Mammary gland is the narrower scientific term used in biology and medicine to refer specifically to the milk-secreting tissue within the breast or mamma. Udder is reserved for four-footed farm mammals (cows, goats, sheep) whose mammae are grouped into a single pendulous organ. For example, a doctor might say 'breast cancer' to a patient, but the same doctor would read about 'mammary gland tumours' in a medical journal and refer to 'the cow's udder' on a farm visit.
Common collocations
Etymology
Borrowed directly from Latin mamma meaning 'breast' or 'teat'. The Latin word itself is thought to come from a baby's natural repeated 'ma-ma' sound — the same nursery-word origin that gave us 'mother' in many languages. It entered English as an anatomical term in the late 1500s.