Limaçon

In geometry, a limaçon or limacon n, also known as a limaçon of Pascal, is defined as a roulette formed when a circle rolls around the outside of a circle of equal radius. It can also be defined as the roulette formed when a circle rolls around a circle with half its radius so that the smaller circle is inside the larger circle. Thus, they belon...
Found on http://en.wikipedia.org/wiki/Limaçon

Limaçon

Li`ma`çon' (le`mȧ`sôN') noun [ French limaçon , lit., a snail.] (Geom.) A curve of the fourth degree, invented by Pascal. Its polar equation is r = a cos θ + b .
Found on http://www.encyclo.co.uk/webster/L/42

Limaçon

land snail.
Found on http://www.patriciawells.com/glossary/
No exact match found