“+...- noun
Etymology: International Scientific Vocabulary phosph- + molybdic
: any of several heteropoly acids obtainable from solutions of phosphoric acid and molybdic acid and used chiefly as precipitants (as for alkaloids and for basic dyes for organic pigments) ; especially : the yellow crystalline acid H 3 PMo 12 O 40 . x H 2 O containing twelve atoms of mollybdenum in the molecule — called also molybdophosphoric acid