e/Reflection through the origin

Information
has gloss	eng: In mathematics, reflection through the origin refers to the orthogonal transform (Euclidean isometry) of v \mapsto -v, also written -I or scalar multiplication by -1. In coordinates, in two dimensions, this is the map that sends (x,y) \mapsto (-x,-y), in three dimensions, this sends (x,y,z) \mapsto (-x,-y,-z), and so forth.
lexicalization	eng: reflection through the origin
instance of	c/Euclidean symmetries