Correct

天干

/ tiāngān /

Strokes

Definition

the 10 heavenly stems 甲[jiǎ], 乙[yǐ], 丙[bǐng], 丁[dīng], 戊[wù], 己[jǐ], 庚[gēng], 辛[xīn], 壬[rén], 癸[guǐ], used cyclically in the calendar and as ordinal numbers I, II etc

Example

As a Noun

10 Heavenly Stems ［used as serial numbers and also in combination with the 12 Earthly Branches to designate years, months, days and hours］