first sign of the Chinese calendar; first of the ten celestial stems
Refers to 甲 (きのえ), the first of the ten celestial stems (十干) used in the traditional Chinese sexagenary cycle. This is a specialized term encountered mainly in historical, calendrical, or astrological contexts.
See also: 十干
The first of the ten celestial stems is 甲 (きのえ).
甲 (きのえ) is also written as 木の兄 and represents yang wood.