a combining form representing manganese in compound words:
manganite.
Also, especially before a vowel, mangan-.
▪ I.ˈmangano-1used as combining form of manganese in the construction of the names of certain minerals containing that element (see A. H. Chester Dict.Min. 1896): manganocalcite, a calciferous variety of rhodochrosite; also occas.= spartaite; manganocolumbite= mangancolumbite; manganomagnetite= jacobsite; manganophyllite, a manganiferous variety of biotite; manganosiderite, a ferriferous variety of rhodochrosite; manganostibiite, antimoniate of manganese occurring in small black grains; manganotantalite=mangantantalite; † manganowolframite= hübnerite. (Cf. mangan-.)1852Brooke & Miller Phillips' Mineral. 678 Mangano⁓calcite.1877Dana Text-bk.Mineral. 290 Manganophyllite.1887― Man.Mineral. & Petrogr. (ed. 4) 206 Manganostibiite contains both arsenic and antimony.1892― Syst.Mineral. 731 Manganotantalite.1898― Text-bk.Mineral. 491 Manganocolumbite.▪ II.ˈmangano-2used Chem. in names of compounds containing manganese with its lower or ‘manganous’ degree of valency (cf. mangani-).1876Encycl.Brit. V. 535/2 Chromi-cyanides and mangano- and mangani-cyanides, isomorphous with the corresponding iron compounds.1889Morley & Muir Watts' Dict.Chem. II. 328 Manganocyanic acid (or manganocyanhydric acid) H4MnCy6.
mangano-/ˈmaŋgənəʊ/combining form.
ORIGIN: from manganese, manganous: see -o-.
1.Mineralogy. Forming names of minerals or mineral varieties containing (a large amount of) manganese, as manganocolumbite, manganotantalite, etc. Cf. mangan-.