triskaidecagram

triskaideca- +‎ -gram

triskaidecagram (plural triskaidecagrams)

1. A star polygon that has thirteen vertices.

• tridecagram

• (star shape): pentagram (5-pointed), hexagram (6-pointed), heptagram (7-pointed), octagram (8-pointed), nonagram (9-pointed), decagram (10-pointed), hendecagram (11-pointed), dodecagram (12-pointed), triskaidecagram (13-pointed), tetradecagram (14-pointed), pentadecagram (15-pointed),

• (polygon shape): pentagon (5-sided), hexagon (6-sided), heptagon (7-sided), octagon (8-sided), nonagon (9-sided), decagon (10-sided), hendecagon (11-sided), dodecagon (12-sided), triskaidecagon (13-sided), tetradecagon (14-sided), pentadecagon (15-sided),