Hexagram
Hexagram , noun
[Hexa- + -gram.]
A figure of six lines
(a)
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.
(b)
In Chinese literature, one of the sixty-four figures formed of six parallel lines (continuous or broken), forming the basis of the I Ching (Yih King), or “Book of Changes.” — S. W. Williams