(ā) phonetic a, similar to 呵; -azine, see 吖嗪[a1 qin2]
(ādìng) acridine (antiseptic and disinfectant)
(āqín) -azine; heterocyclic compound containing nitrogen in their ring such as pyridine 吡啶[bi3 ding4] C5H5N, pyrazine 哒嗪[da1 qin2] C4H4N2 or pyrimidine 嘧啶[mi4 ding4] C4H4N2