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

Examples of manganese dioxide in a Sentence

Recent Examples on the Web What’s more, the nanoscale particles could be made from readily available, inexpensive minerals, such as ferric oxide and gamma manganese dioxide for the anode and cathode materials, respectively. IEEE Spectrum, 24 Dec. 2023 My intention had been to use manganese dioxide, as the Pech Merle painter did, says Lorblanchet, referring to one of the minerals ground up for paint by the early artists. Roger Lewin, Discover Magazine, 11 Nov. 2019 The negative terminal, or cathode, is formed by a thin layer of conductive manganese dioxide coating the pellet. Eric Schlaepfer, IEEE Spectrum, 14 Jan. 2023 When attached at either end to a circuit such as a light bulb, the zinc inside reacts with the manganese dioxide and loses electrons. Manasee Wagh, Popular Mechanics, 13 May 2022 For example, an alkaline battery, or cell, contains zinc, manganese dioxide, and potassium hydroxide. Manasee Wagh, Popular Mechanics, 13 May 2022 In the future, the photographer plans to test out more exotic thermites like bismuth trioxide and manganese dioxide. Wired, 31 Oct. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'manganese dioxide.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1866, in the meaning defined above

Time Traveler
The first known use of manganese dioxide was in 1866

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Cite this Entry

“Manganese dioxide.” Dictionary, Merriam-Webster, Accessed 19 Apr. 2024.

Kids Definition

manganese dioxide

: a dark compound of manganese and oxygen that is used especially in making glass and ceramics
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