† regradationn.

Origin: A borrowing from Latin. Etymon: Latin regradatio.

Etymology: < post-classical Latin regradatio (in astronomy) backward course (4th or 5th cent.) < regradat- , past participial stem of regradari regrade v.² + classical Latin -iō -ion suffix¹. Compare earlier retrogradation n., gradation n.

Astronomy and Astrology. Obsolete. rare.

= retrogradation n. 1a.

ΘΚΠ

the world > the universe > planet > planetary movement > [noun] > retrograde motion

retrogradation?c1450

retrogration1567

regradation1607

retrograde1613

retrogression1619

retrocession1639

regression1640

regress1642

repedation1646

retrogation1646

antecedence1649

1607 T. Tomkis Lingua iii. vi Starres, Orbes, and Plannets, with their motions, The Orientall Regradations [etc.].

1773 J. Harris Descr. & Use Globes & Orrery (ed. 11) 177 We shall here explain their [sc. the Planets'] Stations, Regradations, Eclipses, Phases, &c.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online September 2020).

单词	regradation
释义	† regradationn. Origin: A borrowing from Latin. Etymon: Latin regradatio. Etymology: < post-classical Latin regradatio (in astronomy) backward course (4th or 5th cent.) < regradat- , past participial stem of regradari regrade v.² + classical Latin -iō -ion suffix¹. Compare earlier retrogradation n., gradation n. Astronomy and Astrology. Obsolete. rare. = retrogradation n. 1a. ΘΚΠ the world > the universe > planet > planetary movement > [noun] > retrograde motion retrogradation?c1450 retrogration1567 regradation1607 retrograde1613 retrogression1619 retrocession1639 regression1640 regress1642 repedation1646 retrogation1646 antecedence1649 1607 T. Tomkis Lingua iii. vi Starres, Orbes, and Plannets, with their motions, The Orientall Regradations [etc.]. 1773 J. Harris Descr. & Use Globes & Orrery (ed. 11) 177 We shall here explain their [sc. the Planets'] Stations, Regradations, Eclipses, Phases, &c. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online September 2020). < n.1607
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