octamethylcyclotetrasiloxane

/ˌɒk.təˌmɛθ.ɪlˌsaɪ.kloʊˌtɛt.rəˌsaɪ.lɒk.seɪn/

noun

A cyclic silicone compound made of a ring of silicon and oxygen atoms with methyl groups attached. It’s mainly used as a raw material for making silicones and as a volatile ingredient in cosmetics and personal care products to give a smooth feel and help other ingredients spread evenly.

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Meanings

nounoctamethylcyclotetrasiloxane (plural octamethylcyclotetrasiloxanes, abbreviation D4)

plural octamethylcyclotetrasiloxanes · abbreviation D4

  1. chemistryA cyclic silicone compound made of a ring of silicon and oxygen atoms with methyl groups attached. It’s mainly used as a raw material for making silicones and as a volatile ingredient in cosmetics and personal care products to give a smooth feel and help other ingredients spread evenly.

Origin

From octa- + methyl- + cyclo- + tetra- + siloxane

Full word history & related roots →
Cite this entry
APA

octamethylcyclotetrasiloxane. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/octamethylcyclotetrasiloxane

MLA

“octamethylcyclotetrasiloxane.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/octamethylcyclotetrasiloxane. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “octamethylcyclotetrasiloxane,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/octamethylcyclotetrasiloxane.

Source: octamethylcyclotetrasiloxane on Wiktionary, CC BY-SA 4.0.