What Is A 19 Sided Polygon Called?

A 19 sided polygon is called :
An Enneadecagon
Here are the name of the first twelve polygons:
3 triangle
4 Square
5 pentagon
6 Hexagon
7 Heptagon
8 Octagon
9 Nanagon
10 Decagon
11 Hendecagon or Undecagon
12 Dodecagon