silion.html - n.
silicon dioxide, occurring as quartz etc. and as a principal constituent of sandstone and other rocks.

silica gel hydrated silica in a hard granular form used as a desiccant.

siliceous adj. (also silicious). silicic adj. silicify v.tr. & intr. (-ies, -ied). silicification n. [L silex -icis flint, after alumina etc.]

silion.html - n.
any of the many insoluble compounds of a metal combined with silicon and oxygen, occurring widely in the rocks of the earth's crust.

silion.html - n.
Chem. a non-metallic element occurring widely in silica and silicates, and used in the manufacture of glass.

Symb.: Si.

silicon chip a silicon microchip. silicon carbide = CARBORUNDUM. Silicon Valley an area with a high concentration of electronics industries. [L silex -icis flint (after carbon, boron), alt. of earlier silicium]

silion.html - n.
any of the many polymeric organic compounds of silicon and oxygen with high resistance to cold, heat, water, and the passage of electricity.

silion.html - n.
lung fibrosis caused by the inhalation of dust containing silica.

silicotic adj.

silion.html - n.
(also silique) (pl. siliquae or siliques) the long narrow seed-pod of a cruciferous plant.

siliquose adj. siliquous adj. [L, = pod]