Methylsiloxane

Part of speech: noun

Definitions

1. A chemical compound consisting of silicon and oxygen atoms bonded with methyl groups, used in various industrial applications
2. An organosilicon molecule where methyl groups replace some hydrogen atoms attached to silicon, forming a chain or cyclic structure with oxygen
3. A substance composed of repeating units of silicon-oxygen backbone modified by methyl substituents, common in the production of silicones

Etymology: "Methylsiloxane" is a technical coinage built from two existing chemical terms, "methyl" and "siloxane." "Methyl" comes from the Greek "methy," meaning "wine," joined to "hyle," meaning "wood" or "matter," because chemists first isolated the methyl group from wood alcohol, the distillation product of wood. "Siloxane" is itself a compound of "silicon" and "oxane," the name for a ring of oxygen and carbon atoms, reflecting the silicon-oxygen backbone that defines the family. The word combines these parts to name a specific class of molecules: a silicon-oxygen chain with methyl groups attached to its silicon atoms. Because such chains are the building blocks of silicone polymers, the term is most often met in manufacturing and materials science, where it names the repeating units from which silicones are made.

Synonyms: siloxane, organosilicon compound