1. silicon oxide

noun. A white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite.
Synonyms
chert flint silicon dioxide silex vitreous silica tridymite quartz lechatelierite silica quartz glass oxide crystal cristobalite
Antonyms
softhearted

2. silicon

noun. (ˈsɪləkən) A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors.
Synonyms
granite semiconductor chemical element Si silicone polymer semiconducting material feldspar atomic number 14 clay quartz silicone sand element felspar
Antonyms
unsteadiness insulator roughen software curve
Etymology
silicon (English)
silex (Latin)
silica (English)
silex (Irish)

3. oxide

noun. (ˈɑːkˌsaɪd) Any compound of oxygen with another element or a radical.
Synonyms
minium silicon dioxide calcium oxide zirconia titanic oxide compound sulfur oxide philosophers' wool philosopher's wool dioxide titanium dioxide calx peroxide fluxing lime burnt lime zirconium dioxide titanium oxide quicklime tetroxide pentoxide calcined lime nitrogen oxide titania red lead sulphur oxide ferric oxide superoxide chemical compound unslaked lime monoxide silicon oxide copper oxide zirconium oxide silica flowers of zinc trioxide zinc oxide lime
Antonyms
smooth rough simple decrease disintegrate
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