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First attested in 2004.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Of a breast cancer: characterized by the lack of expression of estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2). Full definition →
First attested in 2004.
Etymology from Wiktionary, CC BY-SA 4.0.