the univalent group –NO2.
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Origin of nitro group
First recorded in 1885–90
Also called nitro radical.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for nitro group
The residue of nitric acid which replaces hydrogen in benzene is the nitro-group, and the compound is nitrobenzene.Coal|Raphael Meldola