I Ching

- noun
1. Chinese book of ancient origin consisting of 64 interrelated hexagrams along with commentaries. The hexagrams, originally used for divination, embody Taoist philosophy by describing all nature and human endeavor in terms of the interaction of yin and yang.

hex·a·gram

– noun
1. a six-pointed starlike figure formed of two equilateral triangles placed concentrically with each side of a triangle parallel to a side of the other and on opposite sides of the center.
2. a figure of six lines.

tri·gram

– noun
1. a sequence of three adjacent letters or symbols.