| Rating | Solver | Clue |
|---|---|---|
| OGEE | Double curve | |
| CRUNODE | A point where one branch of a curve crosses another branch. See Double point, under Double, a. | |
| YATAGHAN | A long knife, or short saber, common among Mohammedan nations, usually having a double curve, sometimes nearly straight. | |
| NODE | The point at which a curve crosses itself, being a double point of the curve. See Crunode, and Acnode. | |
| FOLIUM | ...inite branches, which have a common asymptote. The curve has a double point, and a leaf-shaped loop; whence the name. Its equation is x3 + y3 = ... | |