ˈtrīəˌzēn, trīˈaˌz-, -_zə̇n noun
Etymology: International Scientific Vocabulary tri- + azine; originally formed as Swedish triazin
1. : any of three parent compounds C 3 H 3 N 3 containing a ring composed of three carbon and three nitrogen atoms that are distinguished by indication of the relative positions of the atoms in the ring or of only the nitrogen atoms ; especially : the symmetrical or 1,3,5-isomer from which cyanuric compounds are derived — compare structural formula
2. : any of various derivatives of the three parent triazines