Vanadate n. : A salt of vanadic acid.

Example:
In the compound NH(4)VO(3), ammonium Vanadate, what is the oxidation number (state) of vanadium (V)?

Taxonomy
vanadate, ions, anion, VO4, tetrahedra, free encyclopedia, compound, tetrahedral, synthesis, chemistry, vanadium, polymeric, lattice, ammonium, cyclic, VO6, octahedra, Aqueous solutions.

Defination from the web:
vanadate, RhVO4, which has a statistical rutile structure where the Rh3+ and V5+ ions randomly occupy ... In chemical nomenclature when vanadate forms part of the name, it indicates that the compound contains an anion with a central vanadium atom, e.g. ...