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4 definitions found

From The Collaborative International Dictionary of English v.0.44 : [ gcide ]


  Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
     1. (Geom.) A plane curve, not re["e]ntrant, 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]

From The Collaborative International Dictionary of English v.0.44 : [ gcide ]


  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]

From Webster's Revised Unabridged Dictionary (1913) : [ web1913 ]


  Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
     1. (Geom.) A plane curve, not re["e]ntrant, 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.
  
     2. Anything which has a spiral form, as a spiral shell.
  
     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.

From Webster's Revised Unabridged Dictionary (1913) : [ web1913 ]


  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.

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