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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 ret·ro·ac·tion /ˌrɛtroˈækʃən/
 反動,反作用,倒行逆施

From: Webster's Revised Unabridged Dictionary (1913)

 Re·tro·ac·tion n.
 1. Action returned, or action backward.
 2. Operation on something past or preceding.