washer method

washer method

[′wash·ər ‚meth·əd]
(mathematics)
A method of computing the volume of a solid of revolution that is hollow about its axis, by integrating over the volumes of infinitesimal washer-shaped slices bounded by planes perpendicular to the axis of revolution.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.