# silsesquioxane

> English word · Noun

## Definitions
1. Any chemical compound with the empirical chemical formula RSiO_(1.5), where R is either hydrogen or an alkyl, alkene, aryl or arylene group.

## Etymology
From silicon + sesqui- + oxygen + -ane.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/silsesquioxane