conchoid

(ˈkɒŋkɔɪd)

(Mathematics) geometry 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

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References in periodicals archive ?

Along the way the curves known as the conchoid and the cissoid were discovered.

The Delian Problem

For instance, we can consider tracing a conchoid of Nicomedes.

On using automated deduction techniques for loci computing in dynamic geometry environments

It retains its vague lobularity and frequently shows conchoid calcifications (corpora arenacea) but is compressed and often loses some of its normal lobular architecture (Figure 9, B).