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1. Oxford American Dictionary

   conchoid

   • IPA[ˈkäNGˌkoid]

   美式

   • n.
     a plane quartic curve consisting of two separate branches either side of and asymptotic to a central straight line (the asymptote), such that if a line is drawn from a fixed point (the pole) to intersect both branches, the part of the line falling between the two branches is of constant length and is exactly bisected by the asymptote.

   • noun: conchoid, plural noun: conchoids

2. • 更多解釋

   conchoid

   • IPA[ˈkɒŋkɔɪd]

   英式

   • n.
     a plane quartic curve consisting of two separate branches either side of and asymptotic to a ...

   Oxford Dictionary