adjective eth·e·noid \ˈethəˌnȯid\

Definition of ethenoid

  1. :  resembling ethylene in chemical properties :  like ethylene or its double bond in unsaturation :  characterized by or produced by virtue of a double bond :  ethylenic ethenoid fatty acids ethenoid resins

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Origin and Etymology of ethenoid

ethene + -oid

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to criticize severely

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