'nitroso group' definitions:

Definition of 'nitroso group'

From: GCIDE

Nitrosyl \Ni*tro"syl\, n. [Nitroso- + -yl.] (Chem.) The radical -NO, called also the nitroso group. The term is sometimes loosely used to designate certain nitro compounds; as, nitrosyl sulphuric acid. Used also adjectively. [1913 Webster]