dihedral group

English

the four-element dihedral group acting on the letter F

Etymology

From di- and -hedron; so called because the polygon, when it can be reflected along certain axes of symmetry, has two faces: its upper side and its underside.

Noun

dihedral group (plural dihedral groups)

1. (group theory) a group of symmetries of a regular polygon

Translations

group of symmetries of a regular polygon