spiral of Ar·chi·me·des /-ˌɑrkəˈmidiz/



 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.

 ◄ ►