Logarithmic spiral
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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Logarithmic spiral — 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.… …   The Collaborative International Dictionary of English

  • Logarithmic spiral — A logarithmic spiral, equiangular spiral or growth spiral is a special kind of spiral curve which often appears in nature. The logarithmic spiral was first described by Descartes and later extensively investigated by Jakob Bernoulli, who called… …   Wikipedia

  • logarithmic spiral — logaritminė spiralė statusas T sritis fizika atitikmenys: angl. logarithmic spiral vok. logarithmische Spirale, f rus. логарифмическая спираль, f pranc. spirale logarithmique, f …   Fizikos terminų žodynas

  • logarithmic spiral — noun : equiangular spiral …   Useful english dictionary

  • Logarithmic Spiral Beaches — Beaches which can be modeled by a logarithmic equation are often called log spiral beaches. They have also historically been described as ‘zeta cure bays’, ‘half heart’ or ‘crenulate’ shaped bays, or ‘headland bays’. The curve can be modeled… …   Wikipedia

  • 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… …   The Collaborative International Dictionary of English

  • Logarithmic curve — 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.… …   The Collaborative International Dictionary of English

  • 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… …   The Collaborative International Dictionary of English

  • Spiral of Archimedes — 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 …   The Collaborative International Dictionary of English

  • Spiral — In mathematics, a spiral is a curve which emanates from a central point, getting progressively farther away as it revolves around the point.piral or helixA spiral and a helix are two terms that are easily confused, but represent different objects …   Wikipedia

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