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biomarker

American

[bahy-oh-mahr-ker] / ˈbaɪ oʊˌmɑr kər /

noun

a distinct biochemical, genetic, or molecular characteristic or substance that is an indicator of a particular biological condition or process.

a blood test to measure protein biomarkers for cancer.

biomarker British

/ ˈbaɪəʊˌmɑːkə /

noun

another name for biological marker

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of biomarker

First recorded in 1970–75; bio- ( def. ) + marker ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"In this study we show how to authenticate a biomarker, verifying that a signal truly comes from life rather than contamination or non-biological chemistry," Shawar adds.

From Science Daily • Feb. 27, 2026

At the International Working Group, a global consortium of neurologists and researchers, its criteria requires three things: the presence of amyloid; tau, another biomarker of Alzheimer’s disease; and cognitive symptoms.

From The Wall Street Journal • Feb. 10, 2026

A blood-based biomarker test called p-tau217 came back positive.

From The Wall Street Journal • Feb. 3, 2026

The findings suggest that microRNA-210 in red blood cells could be used as a biomarker to help detect the risk of cardiovascular complications at an earlier stage.

From Science Daily • Jan. 22, 2026

The results suggest that measuring DNA repeat expansion in blood could serve as a useful biomarker for evaluating future treatments designed to slow repeat growth in diseases such as Huntington's.

From Science Daily • Jan. 9, 2026

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023