/ Dictionary / Index L Lagrangian point: Meaning and Definition of Find definitions for: Lagrang'ian point" Pronunciation: [key] — Astron. Astron. one of five points in the orbital plane of two bodies orbiting about their common center of gravity at which another body of small mass can be in equilibrium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lagrangian function La Granja Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language