Hexagram

Part of speech: noun (n.)

1. A figure composed of two equal triangles intersecting so that each side of one triangle is parallel to a side of the other, and the six points coincide with those of a hexagon.

2. In Chinese literature, one of the sixty-four figures formed of six parallel lines (continuous or broken), forming the basis of the Yih King, or "Book of Changes." S. W. Williams.