/ Dictionary / Index C conservation of angular momentum: Meaning and Definition of Find definitions for: conserva'tion of an'gular momen'tum Pronunciation: [key] — Physics. Physics. the principle that the total angular momentum of a system has constant magnitude and direction if the system is subjected to no external force. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. conservation law conservation of baryon number Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language