A product of a reflection in a line and translation along the same line.
Glide
See also
Reflection, TranslationExplore with Wolfram|Alpha
References
Addington, S. "The Four Types of Symmetry in the Plane." http://mathforum.org/sum95/suzanne/symsusan.html.Referenced on Wolfram|Alpha
GlideCite this as:
Weisstein, Eric W. "Glide." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Glide.html