ㄊㄧㄢtiānㄍㄢgān

  1. 十干中國古代用來表示次序符號地支配合計算時日地支

the 10 heavenly stems 甲[jia3], 乙[yi3], 丙[bing3], 丁[ding1], 戊[wu4], 己[ji3], 庚[geng1], 辛[xin1], 壬[ren2], 癸[gui3], used cyclically in the calendar and as ordinal numbers I, II etc
Tige céleste
Himmelsstämme des chinesischen Kalenders (S)​