Cissoid

[sisɔid]

解释:

(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.

录入:佩内洛普

解释:

n. a plane curve consisting of two infinite branches symmetrically placed with reference to the diameter of a circle so that at one of its extremities they form a Cusp (q.v.) while the tangent to the circle at the other extremity is their common asymptote.

校对:玛吉