phren- combining form orphreni-orphreno- Etymology: Latin phren-, from Greek phren-, phreno-, from phren-, phrēn diaphragm, mind — more at frenetic 1.: mind < phrenology > 2. a.: diaphragm < phrenic > b.: diaphragmatic and < phrenocardiac > 3.: phrenic nerve < phreniclasia >