Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Relating to bivalent manganese or to a compound containing bivalent manganese.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Containing manganese in its +2 oxidation state.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of, pertaining to, designating, those compounds of manganese in which the element has a lower valence as contrasted with manganic compounds.

from The Century Dictionary and Cyclopedia

  • Containing manganese: in chemistry, specifically applied to compounds in which each manganese atom is regarded as having a maximum quantivalence of two. Compare manganic.

Etymologies

From manganese +‎ -ous. (Wiktionary)

Examples

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