osmium tetroxide

noun

Definition of osmium tetroxide

: a crystalline compound OsO4 that is an oxide of osmium, has a poisonous irritating vapor, and is used as a catalyst, oxidizing agent, and biological fixative and stain

First Known Use of osmium tetroxide

1869, in the meaning defined above

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The first known use of osmium tetroxide was in 1869

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Cite this Entry

“Osmium tetroxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/osmium%20tetroxide. Accessed 22 Oct. 2020.

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osmium tetroxide

noun

Medical Definition of osmium tetroxide

: a crystalline compound OsO4 that is an oxide of osmium, has a poisonous irritating vapor, and is used chiefly as a catalyst, as an oxidizing and hydroxylating agent (as in the conversion of alkenes to glycols), and as a biological fixative and stain (as for fatty substances in cytology)

called also osmic acid

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