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2 definitions found
 for Logarithmic spiral
From The Collaborative International Dictionary of English v.0.48 :

  Logarithmic \Log`a*rith"mic\, Logarithmical \Log`a*rith"mic*al\,
     a. [Cf. F. logarithmique.]
     1. Of or pertaining to logarithms; consisting of logarithms.
        [1913 Webster]
  
     2. Using logarithms; as, logarithmic graph paper; a
        logarithmic scale.
        [PJC]
  
     3. Having a logarithm in one or more of the unknowns; -- of
        an equation.
        [PJC]
  
     Logarithmic curve (Math.), a curve which, referred to a
        system of rectangular coordinate axes, is such that the
        ordinate of any point will be the logarithm of its
        abscissa.
  
     Logarithmic spiral, a spiral curve such that radii drawn
        from its pole or eye at equal angles with each other are
        in continual proportion. See Spiral.
        [1913 Webster]

From The 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]

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