Limacon

limaçon

[lim-uh-son]
noun Geometry.
a plane curve generated by the locus of a point on a line at a fixed distance from the point of intersection of the line with a fixed circle, as the line revolves about a point on the circumference of the circle. Equation: r = a cosθ + b.
Also called Pascal's limaçon.


Origin:
1575–85; < French: literally, snail, Old French, derivative of limaz < Latin līmācem, accusative of līmāx snail, slug

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limaçon (ˈlɪməˌsɒn)
 
n
a heart-shaped curve generated by a point lying on a line at a fixed distance from the intersection of the line with a fixed circle, the line rotating about a point on the circumference of the circle
 
[French, literally: snail (so named by Pascal)]

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