silicofluoric

from The Century Dictionary.

• Pertaining to or consisting of silicon and fluorin.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Chem.) Containing, or composed of, silicon and fluorine; especially, denoting the compounds called silicofluorides.
• adjective (Chem.) a compound of hydrofluoric acid and silicon fluoride, known only in watery solution. It is produced by the action of silicon fluoride on water, and is regarded as an acid, H2SiF6, and the type and origin of the silicofluorides.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective chemistry Containing, or composed of, silicon and fluorine.