Any of a class of compounds containing the group \\\NNO₂, some of which are used as propellants or explosives.
Specifically. An aromatic compound of this class, (CH₃)(NO₂)NC₆ H₂ (NO₂)₃, used as a pH indicator and in explosives.
An alkaloid which occurs naturally in several shrubs of the genus Nitraria (nitre-bushes); C₁₀ H₁₉ NO.