Book of Divination
Refers to a specific historical or esoteric text used for fortune-telling, often associated with Onmyōdō or Buddhist divination. Not a common everyday word.
The Sanzesō is considered one of the divination texts of Onmyōdō.
The term is composed of 三世 (three worlds/lifetimes) and 相 (aspect/physiognomy), suggesting a method of divination that examines past, present, and future conditions. The exact historical derivation is uncertain.