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De - Pt| English Dictionary: logarithmic spiral | by the DICT Development Group |
| 2 results for logarithmic spiral | |
| From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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Logarithmic \Log`a*rith"mic\, Logarithmical \Log`a*rith"mic*al\, a. [Cf. F. logarithmique.] Of or pertaining to logarithms; consisting of logarithms. {Logarithmic curve} (Math.), a curve which, referred to a system of rectangular co[94]rdinate 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}. | |
| 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[89]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. | |
