tridecagram

From trideca- +‎ -gram.

tridecagram (plural tridecagrams)

1. A star polygon that has thirteen vertices.

• triskaidecagram

• (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)