| Answer | Crossword Clue |
|---|---|
| acnode | an isolated point on a mathematical curve |
| acnodal | being an isolated point on a mathematical curve |
| acnodes | ACNODE, an isolated point on a mathematical curve |
| epitrochoid | a curve like an epicycloid but generated by any point on a radius |
| epitrochoids | EPITROCHOID, a curve like an epicycloid but generated by any point on a radius |
| spiral | Winding in a continuous and gradually widening (or tightening) curve, either around a central point on a flat plane or about an axis so as to form a cone |
