libratory

• Moreover, since her orbit is nearly circular, libratory effects are very small. —  A Popular History of Astronomy During the Nineteenth Century Fourth Edition
• The band, who identify as libratory socialists, said at first they thought Chavez was just a populist who knew how to talk, as a result of the media in Spain. —  Venezuela Analysis
• Herschel had a theory on the subject -- viz., that just where the balancing or libratory swing of the moon brings into view the greatest extent beyond the eastern or western parts of that hemisphere which is turned earthwards in the moon's mean or average position, lunar inhabitants would probably be found, and nowhere else. —  Myths and Marvels of Astronomy
• Horrox as depending upon the libratory motion of the apsides, and the change which takes place in the eccentricity of the lunar orbit. —  The Astronomy of Milton's 'Paradise Lost'
• The three satellites would participate in this libratory movement, the extent of oscillation depending in each case on the mass of the satellite and its distance from the primary, but the period of libration is the same for all the satellites, amounting to —  Biographies of Distinguished Scientific Men

Allen's Synonyms and Antonyms