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单词 retrogradient
释义

retrogradientadj.

Brit. /ˌrɛtrə(ʊ)ˈɡreɪdɪənt/, U.S. /ˌrɛtroʊˈɡreɪdiənt/
Forms: late Middle English–1500s retrogradyent, late Middle English 1800s 2000s– retrogradient.
Origin: A borrowing from Latin. Perhaps also partly a borrowing from French. Etymons: Latin retrōgradient-, retrōgradiēns, retrōgradī; French retrogradient.
Etymology: < classical Latin retrōgradient-, retrōgradiēns, present participle of retrōgradī retrograde v., in early use perhaps via Anglo-Norman retrogradient (early 14th cent.). Compare slightly earlier retrograde adj.
rare.
= retrograde adj.
ΘΚΠ
the world > the universe > planet > planetary movement > [adjective] > retrograde
retrogradec1400
retrogradientc1425
retrogradant1523
retrocedent1583
c1425 J. Lydgate Troyyes Bk. (Augustus A.iv) iv. 3374 (MED) Whan..Phebus chare, in his discencioun, Oute of þe Crabbe toward þe Lyoun Holdeth his course in þe firmament..he is retrogradient.
a1475 (?a1430) J. Lydgate tr. G. Deguileville Pilgrimage Life Man (Vitell.) 12351 Whan they travaylle to resyste To the heuene callyd ‘mobyle’, In the Epicicles whan they be, They make hem retrogradyent And cause hem in the ffyrmament Ther tabyde stacionarye.
1862 Amer. Jrnl. Sci. 83 255 The nodes of the ring, so far as affected at all, are up to a certain limit retrogradient.
1890 H. W. Scott Hist. Portland ii. 61 A small stream..throws one portion of the site toward the south..and the other portion toward the north..against the northern and more retrogradient peaks.
2009 J. Bach Princ. Synthetic Intelligence iii. 96 This is achieved by a way of retro-gradient reinforcement... It strengthens the links to the immediately preceding protocol elements.
This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022).
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adj.c1425
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