Di (ancient Chinese ethnic group)
Historical term for an ancient non-Han people in China. Used in historical or archaeological contexts.
The Di were one of the ethnic groups that lived in the western regions of ancient China.
One of the 28 Chinese lunar mansions, part of the Azure Dragon group. Used in traditional East Asian astronomy and astrology.
See also: 二十八宿 · 蒼竜 (そうりょう)
氐 is one of the 28 mansions, corresponding to the third mansion of the Azure Dragon.
The character 氐 is a Chinese character used in historical and astronomical contexts. Its Japanese reading てい derives from the Chinese reading. The exact origin of the character's shape is uncertain, but it is conventionally associated with the meanings 'root' or 'foundation' in the constellation name, and as a name for an ancient ethnic group.