Definition of manganese dioxide
: a dark insoluble compound MnO2 used especially as an oxidizing agent, as a depolarizer of dry cells, and in making glass and ceramics
Keep scrolling for more
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
- Are We Entering 'Uncharted' or 'Unchartered' Waters?
- Complaining About 'Obnoxious'
- 6 Words That Didn’t Always Describe Food
- 'Arrive At' vs. 'Arrive To': A Very Nerdy Analysis
Ask the Editors