A hyponitrite refers to ionic compounds that contain the hyponitrite ion, N2O22−, ([ON=NO]2−) or to organic hyponitrites (RON=NOR), for example di-tert butyl hyponitrite. ==Hyponitrite ion== There are cis and trans forms of the hyponitrite ion. The trans form is generally found in hyponitrite salts such as sodium hyponitrite, Na2N2O2 and silve...
• (n.) A salt of hyponitrous acid.
Hy`po·ni'trite noun (Chemistry) A salt of hyponitrous acid. 
a salt or ester of hyponitrous acid.