what is phenazine
phenÂ·aÂ·zine (fÄnâ²É-zÄnâ²) also phenÂ·aÂ·zin (-zÄ­n) n. A yellow crystalline compound, C12H8N2, used in the manufacture of dyes. phenazine (ËfÉnÉËziËn) n (Elements & Compounds) a yellow crystalline tricyclic compound that is the parent compound of many azine dyes and some antibiotics.