Definition of retrogration in English:

retrogration

noun ˌrɛtrə(ʊ)ˈɡreɪʃn

Mid 16th century; earliest use found in William Bourne (c1535–1582), writer on mathematics. Shortened from retrogradation. Compare retrogation.

nounˌrɛtrə(ʊ)ˈɡreɪʃn

Mid 16th century; earliest use found in William Bourne (c1535–1582), writer on mathematics. Shortened from retrogradation. Compare retrogation.

单词	retrogration
释义	Definition of retrogration in English: retrogration noun ˌrɛtrə(ʊ)ˈɡreɪʃn Retrogradation. Origin Mid 16th century; earliest use found in William Bourne (c1535–1582), writer on mathematics. Shortened from retrogradation. Compare retrogation. Definition of retrogration in US English: retrogration nounˌrɛtrə(ʊ)ˈɡreɪʃn Retrogradation. Origin Mid 16th century; earliest use found in William Bourne (c1535–1582), writer on mathematics. Shortened from retrogradation. Compare retrogation.
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