acetic anhydride

noun

Definition of acetic anhydride 

: a colorless liquid C4H6O3 with a pungent odor used in organic synthesis (as of cellulose acetate and aspirin)

First Known Use of acetic anhydride

1855, in the meaning defined above

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The first known use of acetic anhydride was in 1855

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acetic anhydride

noun

Medical Definition of acetic anhydride 

: a colorless liquid (CH3CO)2O with a pungent odor and lacrimatory and vesicant action that is used especially in making acetyl derivatives (as aspirin)

More from Merriam-Webster on acetic anhydride

Britannica.com: Encyclopedia article about acetic anhydride

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