pentagram

A five-pointed or five-lobed figure, as the figure of a five-rayed star; specifically, the magic sign also called pentacle. See pentacle.

In geometry, a five-sided polygram.

A pentacle or a pentalpha.

The shape of a five-pointed star constructed of five intersecting lines meeting at the vertices, such that a central pentagon and five surrounding isosceles triangles are formed; often with magical connotations.

a 5/2 star polygon

a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon