center-of-mass coordinate system
center-of-mass coordinate system[′sen·tər əv ′mas kō′ȯrd·nət ‚sis·təm]
A reference frame which moves with the velocity of the center of mass, so that the center of mass is at rest in this system, and the total momentum of the system is zero. Also known as center of momentum coordinate system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.