Meaning of spiral of Archimedes

spi'ral of Archime'des

Pronunciation: [key]
— Geom. Geom.
  1. a curve that is the locus of a point that moves outward with uniform speed along a vector, beginning at the origin, while the vector rotates about the origin with uniform angular velocity. Equation (in polar coordinates):&thgr;. r = a
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.