Noun:

1. a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course

retrorseadj.逆向的；反向的；向下的retroadj.（时装或化妆）重新流行的n.减速火箭(=retrorocket)；重新流行pref.表示“向后”、“回归”、“在后面”retropharyngeal lymphadenopathy咽后淋巴结retrogressive complex inference后退的复合推理Retro-laparoscopic techniques腹腔镜retroperitoneal lymphadenectomy腹膜后淋巴结切除术retroperitoneal neoplasms/TH腹膜后肿瘤／治疗retrofit of communication system通信系统改造retroperitioneal visceral injury腹膜后损伤retro-prospective cohort study世代研究法Retroperitoneal lymphnodenectomy腹膜后淋巴结清除Retroperitoneescopic nephrectomy后腹腔镜肾切除术