hexagon

hexa- (English)

Forming compound words with the sense of "six".

-gon (English)

(geometry) Forms the names of plane figures containing a given number of angles, and thus bounded by that number of line segments (polygons). If the number is large enough, it can be attached directly to an English numeral with a hyphen.

hexagon (English)

(geometry) A polygon with six sides and six angles.