The Collaborative International Dictionary
Mutually equiangular
Equiangular \E`qui*an"gu*lar\, a. [Equi- + angular. Cf. Equangular.] Having equal angles; as, an equiangular figure; a square is equiangular.
Equiangular spiral. (Math.) See under Spiral, n.
Mutually equiangular, applied to two figures, when every angle of the one has its equal among the angles of the other.