retrogration
/ˌrɛtrə(ʊ)ˈɡreɪʃn/noun
= retrogradation.
Origin
Mid 16th century; earliest use found in William Bourne (c1535–1582), writer on mathematics. Shortened from retrogradation. Compare retrogation.
| 单词 | retrogration |
| 释义 | retrogration/ˌrɛtrə(ʊ)ˈɡreɪʃn/noun = retrogradation. Origin |
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