Definitions

1. adjective

relating to or containing manganous ions, especially in a solution or compound.

“The manganous ion is a key component in the production of certain pigments.”

2. noun

a salt or compound containing manganous ions.

“Manganous sulfate is often used as a mordant in dyeing and calico printing.”

3. noun

an ion with a +2 charge, typically manganese in a +2 oxidation state.

“The manganous ion is important in the context of redox reactions and electrochemistry.”