Definition of "apsides" [ap•si•des]

• Plural form of apside. (noun)
• Plural form of apsis. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "(Newton must have been mystified by the failure of his seemingly parallel derivation of the 9 year precession of the line of apsides to achieve better than 50 percent agreement.)"
• "Nobody could ascertain the exact purpose of the set of maneuvers; they were just "orientation changes," according to the Earth scientists, that had altered the inclination and line of apsides of the Rama orbit."
• "Any persons whom it could please have no better notion of what the words referred to signify than of the meaning of _apsides_ and"