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methylation

American  
[meth-uh-lay-shuhn] / ˌmɛθ əˈleɪ ʃən /

noun

Chemistry.
  1. the process of replacing a hydrogen atom with a methyl group.


Etymology

Origin of methylation

First recorded in 1875–80; methylate + -ion


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.

See Examples For:

The Galleri test is designed to detect cancer-specific methylation patterns shared by many types of cancer before symptoms appear, including cancers that don’t have recommended screening today.

From The Wall Street Journal ● Sep. 23, 2026

GRAIL’s Galleri test looks for methylation patterns in DNA that may indicate a cancer signal and predict where it originated.

From Slate ● Sep. 9, 2026

Rather than looking mainly for mutations, they focused on DNA methylation, chemical tags on DNA that help control gene activity.

From Science Daily ● Aug. 11, 2026

Different tissues have distinct methylation patterns, and those patterns can shift when cells become diseased or cancerous.

From Science Daily ● Aug. 11, 2026

From 1858 to 1861 methylated spirit was duty-free when it was required for manufacturing processes, and the methylation or ``denaturizing'' was carried out in accordance with a prescribed process.

From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg

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