manganosite Min.
(ˈmæŋgənəʊsaɪt)
[ad. G. manganosit, f. mangan manganese.]
Protoxide of manganese, occurring in small green octahedral crystals which turn black on exposure to the air.
| 1887 Dana Man. Mineral. & Petrogr. (ed. 4) 206. |
manganosite Min.
(ˈmæŋgənəʊsaɪt)
[ad. G. manganosit, f. mangan manganese.]
Protoxide of manganese, occurring in small green octahedral crystals which turn black on exposure to the air.
| 1887 Dana Man. Mineral. & Petrogr. (ed. 4) 206. |
Oxford English Dictionary