Affine Geometry

1. (geometry, uncountable) The branch of geometry dealing with what can be deduced in Euclidean geometry when the notions of line length and angle size are ignored. Affine geometry - Wikipedia
2. (countable) A geometry that is otherwise Euclidean but disregards lengths and angle sizes.

Usage notes

Affine geometry is frequently described as what remains of Euclidean geometry when one "forgets" the metric notions of distance and angle.