DICT.TW Dictionary Taiwan

 Log·a·rith·mic Log·a·rith·mic·al a.
 1. Of or pertaining to logarithms; consisting of logarithms.
 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.
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 Spi·ral n.
 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.
 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.
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