Webster's Revised Unabridged Dictionary · 1913

A five-pointed star, also called a pentagram or pentalpha. Sometimes referring to a similar figure, such as the figure composed of two equilateral triangles intersecting so as to form a six-pointed star. It was used in early ornamental art, and also with superstitious import by the astrologers and mystics of the Middle Ages. The six-pointed star is more commonly called a hexagram, or called Solomon's seal; it resembles the star of David (Magen David)