elliptic conchoid [数] 椭圆蚌线
hyperbolic conchoid [数] 双曲蚌线 ; 双曲螺线
parabolic conchoid [数] 抛物蚌线
conchoid d 蚌线
sluse conchoid 斯吕塞蚌线
conchoid bodies 甲状小体
以上来源于: WordNet
N a plane curve consisting of two branches situated about a line to which they are asymptotic, so that a line from a fixed point (the pole) intersecting both branches is of constant length between asymptote and either branch. Equation: (x – a)²(x² + y²) = b²x² where a is the distance between the pole and a vertical asymptote and b is the length of the constant segment 蚌线 [geometry]
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