[ nahy-troh-soh ]
/ naɪˈtroʊ soʊ /

adjective Chemistry.

(especially of organic compounds) containing the nitroso group; nitrosyl.

Origin of nitroso

First recorded in 1880–85; independent use of nitroso-

Definition for nitroso (2 of 2)


a combining form of the nitroso group: nitrosobenzene.
Also especially before a vowel, nitros-.

Origin of nitroso-

combining form of Latin nitrōsus full of natron, equivalent to nitr(um) native soda, natron (< Greek nítron soda) + -ōsus -ose1; see -o- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for nitroso

/ (naɪˈtrəʊsəʊ) /


(modifier) of, consisting of, or containing the monovalent group O:N-a nitroso compound

Word Origin for nitroso

C19: from Latin nitrōsus full of natron; see nitre
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for nitroso



The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.