'Hexagram' definitions:
Definition of 'hexagram'
(from WordNet)
noun
A regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles
Definition of 'Hexagram'
From: GCIDE
- Hexagram \Hex"a*gram\, n. [Hexa- + -gram.] A figure of six lines; specif.: (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. [Webster 1913 Suppl.]