ˈaˌzēn, ˈā-, -_zə̇n noun
( -s )
Etymology: International Scientific Vocabulary az- + -ine
1.
a. : any of a large class of organic compounds that is characterized by a 6-membered ring containing two or more atoms of nitrogen or at least one atom of nitrogen and one other hetero atom (as oxygen or sulfur) and that is subdivided according to the kind and number of hetero atoms(as diazines, triazines, oxazines, thiazines) ; especially : a paradiazine or analogous oxazine or thiazine
b. : azine dye
2. : a compound of the general formula RCH . NN . CHR or R 2 C . NN . CR 2 formed by the action of hydrazine on aldehydes or ketones