conchoid
/ˈkɑŋkɔɪd/
noun
- A mathematical curve that is traced by a point moving so that its distance from a fixed line is constant, often shaped like a shell.
- The conchoid of Nicomedes is an ancient curve used to solve problems like trisecting an angle.
- The artist used a conchoid shape as the basis for her sculpture.
- In geometry class, we learned how to draw a conchoid using a straight line and a fixed point.
Synonyms