retro- 📖 中文释义 [医] 后, 向后, 在后 🔗 释义中的汉语词 📘 English Definition(英文释义) A prefix or combining form signifying backward, back; as,retroact, to act backward; retrospect, a looking back. ← retro Diels-Alder reaction R 字母词表 retro-active amnesia →