equiangular spiral

2 definitions found

equiangular spiral - Collaborative International Dictionary of English v.0.48 :

  Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
     1. (Geom.) A plane curve, not reentrant, described by a
        point, called the generatrix, moving along a straight line
        according to a mathematical law, while the line is
        revolving about a fixed point called the pole. Cf.
        Helix.
        [1913 Webster]
  
     2. Anything which has a spiral form, as a spiral shell.
        [1913 Webster]
  
     Equiangular spiral,a plane curve which cuts all its
        generatrices at the same angle. Same as Logarithmic  spiral
        , under Logarithmic.
  
     Spiral of Archimedes, a spiral the law of which is that the
        generatrix moves uniformly along the revolving line, which
        also moves uniformly.
        [1913 Webster]

  Equiangular \E`qui*an"gu*lar\, a. [Equi- + angular. Cf.
     Equangular.]
     Having equal angles; as, an equiangular figure; a square is
     equiangular.
     [1913 Webster]
  
     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.
        [1913 Webster]