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Meaning of Trojan group

Tro'jan group"

Pronunciation: [key]
— Astron. Astron.
  1. a group of asteroids oscillating about either of two points, equidistant from the sun and Jupiter, that forms an equilateral triangle with the sun and Jupiter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.