丙子 bǐngzǐ thirteenth year Origin Definitions Defs Strokes Stroke Words Sentences Sents 丙 bǐng third heavenly stem The third of the ten Heavenly Stems子 zǐ [Earthly Branch] the first of the twelve Earthly Branches, representing the North, the year of the Rat, and the time from 11 p.m. to 1 a.m.