conchoid
/kong-koid/US // ˈkɒŋ kɔɪd //UK // (ˈkɒŋkɔɪd) //
螺帽状,螺帽型,苣荬菜,螺帽
Definitions
n.名词 noun
- 1
Geometry.
- : a plane curve such that if a straight line is drawn from a certain fixed point, called the pole of the curve, to the curve, the part of the line intersected between the curve and its asymptote is always equal to a fixed distance. Equation: r = b ± a sec.
Examples
The conchoid has been employed by later mathematicians, notably Sir Isaac Newton, in the construction of various cubic curves.
Conchoid′al, pertaining to a conchoid: shell-like, applied to the fracture of a mineral; Concholog′ical, pertaining to conchology.
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