/-{-{dīngxī}-}-/, /tɪŋ⁵⁵ hei̯⁵⁵/, /ding1 hei1/, /ding1 hei1/, /ding1 héi1/, /dingshi/, /dingsi/、/ㄉㄧㄥ ㄒㄧ/
(有機化學) 化學式为C4H8 的烯烴