cissoid
/'sisɔid/
📖 中文释义
- 凹边的,蔓叶线的
📘 English Definition（英文释义）
- n. A curve invented by Diocles, for the purpose of solving
- two celebrated problems of the higher geometry; viz., to trisect a
- plane angle, and to construct two geometrical means between two given
- straight lines.