mesyl

• (Received Pronunciation) IPA^(key): /ˈmiː.sʌɪl/, /ˈmiː.sɪl/
• (General American) IPA^(key): /ˈmɛs.əl/, /ˈmi.səl/
• Rhymes: -ɛsəl

Contraction of methylsulfonyl.

mesyl (plural mesyls)

1. (organic chemistry, especially in combination) The univalent radical CH₃SO₂– of methanesulfonic acid.

• mesilate (mesylate)

From Middle English mesel (“leprous, leper”), from Norman mesel (“leprous, leper”), from Old French mesel (“leprous, leper”), from Late Latin misellus (“leper”), from miser (“wretched, wretch”) + -ellus (“-elle”). Doublet of measles.

mesyl

1. Obsolete form of mesel, in its various senses.

mesyl (plural mesyls)

1. Obsolete form of mesel, in its various senses.

• “† mesel, adj. and n.”, in OED Online ⁠, Oxford: Oxford University Press, 2022.
• “mesyl”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “mesyl”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.

• Myles, lymes, yelms