nitro group

English Thesaurus

1. the group -NO3 (noun.substance)

hypernym	:	chemical group, group, radical,
definition	:	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule (noun.substance)

substance meronym	:	nitrate,
definition	:	any compound containing the nitrate group (such as a salt or ester of nitric acid) (noun.substance)