Metatungstic :: Metatungstic (a.) Of, pertaining to, or designating, an acid known only in its salts (the metatungstates) and properly called polytungstic, or pyrotungstic, acid..
Polytungstic :: Polytungstic (a.) Containing several tungsten atoms or radicals; as, polytungstic acid..
Pyrotungstic :: Pyrotungstic (a.) Polytungstic. See Metatungstic.
Silicotungstic :: Silicotungstic (a.) Of, pertaining to, or designating, any one of a series of double acids of silicon and tungsten, known in the free state, and also in their salts (called silicotungstates)..