The Collaborative International Dictionary
manganic acid
manganic acid \manganic acid\ n. A dibasic acid H2MnO4, formed from manganese, analogous to sulphuric acid; it is found only in solution and in manganate salts.
Wiktionary
manganic acid
n. (context chemistry English) An acid, H2MnO4, formed from manganese, analogous to sulfuric acid.
WordNet
manganic acid
n. a dibasic acid (H2MnO4) found only in solution and in manganate salts