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silicotungstic acid

noun
sil·​i·​co·​tungstic acid | \ "+...-\

Definition of silicotungstic acid 

: any of several heteropoly acids of silicon and tungsten especially : a pale-yellow crystalline acid H4SiW12O40.x H2O containing 12 atoms of tungsten in the molecule, obtainable by acid hydrolysis of a mixture of sodium tungstate and sodium silicate, and used chiefly as a precipitant for alkaloids

— called also tungstosilicic acid

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History and Etymology for silicotungstic acid

silic- + tungstic

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