orthogonal group
mathematical group consisting of transformations of a Euclidean space which preserve distance and a fixed point
en-US/ɔɹˈθɔɡənəl ˈɡɹup/
en-GB/ɔːθɒɡənəl ˈɡɹuːp/
mathematical group consisting of transformations of a Euclidean space which preserve distance and a fixed point