| 单词 | retrogressional | 
| 释义 | retrogressional in British English (ˌrɛtrəˈɡrɛʃənəl) adjective   another word for retrogressive retrogress in British English (ˌrɛtrəʊˈɡrɛs) verb (intransitive) 1.  to go back to an earlier, esp worse, condition; degenerate or deteriorate 2.  to move backwards; recede 3.  biology  to develop characteristics or features of lower or simpler organisms; degenerate  Derived forms retrogression (ˌretroˈgression) noun retrogressive (ˌretroˈgressive)  adjective retrogressively (ˌretroˈgressively)  adverb Word origin C19: from Latin retrōgressus having moved backwards, from retrōgradī; see retrograde | 
	
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