an ancient Chinese compass point representing a bearing of 15 degrees

癸位是罗盘上二十四个方位之一。

a prefix used in scientific nomenclature and measurement to represent the number ten

癸烷是一种含有十个碳原子的有机化合物。

numeral · the tenth of the ten Heavenly Stems, often used to denote the tenth in a sequence or as a placeholder for the letter 'J' or Roman numeral 'X'

癸在天干中排在最后一位。