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something that identifies or that is used to identify; see also determinant.
cell-surface marker an antigenic determinant found on the surface of a specific type of cell.
tumor marker a biochemical substance indicative of presence of a tumor; ideally, it should be specific, sensitive, and proportional to tumor load. Called also biomarker.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.