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retriever one of several breeds of dogs trained to retrieve wounded or killed game. [2 definitions]
retro1 a retrorocket.
retro2 designating or pertaining to an earlier style of hairdressing, clothing, or the like, that has been brought back.
retro- back; backward; behind.
retroactive going into operation or effect as of a previous date, or in respect to past events or circumstances.
retrocede1 to go or move back; recede; retire.
retrocede2 to surrender or give back to (territory).
retrofire to ignite (a rocket engine that is placed opposite the direction of current flight) for the purpose of slowing down or adjusting direction.
retrofit to modify design, construction, or equipment (of an aircraft, automobile, or the like) that is already in service in order to include later improvements. [2 definitions]
retroflex bent or turned backward. [2 definitions]
retroflexion the state or quality of being retroflex.
retrograde moving or tending to move in a backward direction; retreating. [4 definitions]
retrograde amnesia amnesia about events that occurred just before the onset of the amnesia.
retrogress to return to a former, usu. inferior condition; degenerate; revert.
retrorocket a small rocket engine mounted so that its direction of thrust is opposite to the direction of the main rocket, used for slowing down, changing direction, or the like.
retrorse turned backward or downward, as some petals.
retrospect reflection on the past or on past events or achievements.
retrospection the act, an instance, or the ability of reviewing past events. [2 definitions]
retrospective looking back on or thinking of the past. [3 definitions]
retroussť turned upward, as a nose.
retrovirus any of a group of related RNA viruses, such as those that cause leukemia and AIDS, in which a reversal of genetic transcription occurs, from RNA to DNA rather than from DNA to RNA.