\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.