(inorganic chemistry) silicon dioxide (SiO₂), silica. / (inorganic chemistry) silicon monoxide (SiO).

(inorganic chemistry) The binary compound, SiGe of silicon and germanium; sometimes considered to be a simple alloy silicon germanium.

(inorganic chemistry) The binary compound of silicon and fluorine SiF₄, a colourless, poisonous gas with a pungent odour, used in the production of silicon semiconductors.

(idiomatic) A ridiculously large (or, less commonly, small) sum of money.

plural of silver dollar

(US) A dollar coin, whether made from silver or not. / (US) A small pancake.

Any of several small fish, mostly in families Atherinidae and Atherinopsidae, both in order Atheriniformes, that are characterized by bright, silvery scales.

Blicca bjoerkna (white bream), a freshwater species of cyprinids from Europe and Western Asia.

(Britain) Full cream milk, normally homogenised and pasteurised, having a silvery top to the bottle. / (slang) An old person.

A silver-coloured fish with a dark back, Pseudocaranx dentex, found in warm waters worldwide.