(n,vs) silicification
(n) quartzite
(n) silica sand
(n) silicic acid
(n) silica
(n) silicon (Si)
(n,adj-no) diatom
(n) silicosis
(n) silicide
(n) silicified wood
(n) silicate
(n) silicate
(n) silicon steel
(n) diatomaceous soil
(n) silicosis
(n) siliceous sponge (any sponge other than those of class Calcarea)
(n) silicone resin
(n) silicon carbide (SiC)
(n) silicon nitride (Si3N4)
(n) pneumonoultramicroscopicsilicovolcanoconiosis
pneumonoultramicroscopicsilicovolcanokoniosis
(n) silicon tetrachloride (SiCl4)
(n) silicon dioxide (SiO2)
silica
(n) garnierite
(n) sodium silicate (Na2SiO3)