methylate

Verb

 * 1) To add, or treat with methyl alcohol (see methylated spirits)
 * 2)  To add a methyl group to a compound
 * 3)  To add a methyl group to a nucleic acid as part of the process of gene expression

Related terms

 * methylation

Noun

 * 1)  The anion -O-CH3- derived from methanol by loss of a proton; any salt containing this anion