Definition of "luminal" [luminal]

• Of or pertaining to the lumen (adjective)
• A sedative. (noun)

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• "The exception was HCC1500, which we classified as luminal while Neve et al. labeled it as basal B."
• "Previously it was thought that a different type of immature cell, known as a luminal cell, lay at the root of prostate cancer."
• "They include two estrogen receptor (ER) - positive subtypes, termed luminal A and B, and three ER-negative subtypes, termed basal-like, HER2-positive, and normal breast-like tumors."