plane group

plane group

[′plān ‚grüp]
(crystallography)
The group of operations (rotations, reflections, translations, and combinations of these) which leave a regular, periodic structure in a plane unchanged.
(mathematics)
One of 17 two-dimensional patterns which can be produced by one asymmetric motif that is repeated by symmetry operations to produce a pattern unit which then is repeated by translation to build up an ordered pattern that fills any two-dimensional area. Also known as plane symmetry group.
References in periodicals archive ?
The separate from primary school Pausenplatz the sec lies between the existing impressive plane group and the new building.
TAI Plane Group Head Ozcan Ertem said the company's major objective this year is marketing the Hurku?
In two dimensions there are only ten point groups and seventeen plane groups.