| Rating | Solver | Clue |
|---|---|---|
| REPRODUCING | Duplicating | |
| DUPLICATIVE | Having the quality of duplicating or doubling. | |
| DUPLICATION | The act of duplicating, or the state of being duplicated; a doubling; a folding over; a fold. | |
| CONCHOID | A curve, of the fourth degree, first made use of by the Greek geometer, Nicomedes, who invented it for the purpose of trisecting an angle and duplicating the cube. |