The British spelling variant of galactorrhea; abnormal or excessive milk discharge from the breast.
From Greek 'gala' (milk) + 'rhoia' (flowing), with '-rrhoea' being the British English spelling preference for the Greek suffix '-rhoia'.
The difference between galactorrhea and galactorrhoea is purely spelling—British English prefers the double-r spelling for many Greek medical terms, a quirk of how different English-speaking countries standardized medical terminology.
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