from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the addition of a methyl group to a molecule
- n. the addition of a methyl group to cytosine and adenine residues in DNA that leads to the epigenetic modification of DNA and the reduction of gene expression and protein production
from The Century Dictionary and Cyclopedia
- n. The act of methylating. See methylate.
methyl + -ation (Wiktionary)