Darwin ellipsoids

Darwin ellipsoids

[′där·wən ə′lip‚sȯidz]
(astronomy)
Ellipsoidal figures of equilibrium of homogeneous bodies moving about each other in circular orbits, calculated by making certain approximations about their mutual tidal influences.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.