noun ac·e·ton·yl·i·dene \ˌa-sə-tō-ˈni-lə-ˌdēn, ə-ˌse-tə-\

Definition of acetonylidene



  1. :  the bivalent radical CH3COCH< formed by removal of two hydrogen atoms from the same carbon atom of acetone

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Origin and Etymology of acetonylidene

acetonyl + -idene

First Known Use: 1919

Seen and Heard

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quaintly unconventional or refined

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