noun Chemistry.
any of the class of compounds containing the structural unit R 2 SiO, where R is an organic group or hydrogen.

1920–25; sil(icon) + ox(ygen) + -ane Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
siloxane (sɪˈlɒkseɪn)
See also silicone any of a class of compounds containing alternate silicon and oxygen atoms with the silicon atoms bound to hydrogen atoms or organic groups. Many are highly complex polymers
[C20: from sil(icon) + ox(ygen) + (meth)ane]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
People in the industry also sought to develop rigid, gas-permeable lenses made primarily with siloxane-containing components.
Silicone compounds in these formulations consist mostly of linear dimethyl siloxane polymers.
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