limacon
Li`ma`con", n. Etym: [F. limacon, lit., a snail.] (Geom.) Defn: A curve of the fourth degree, invented by Pascal. Its polar equation is r = a cos + b.
Li`ma`con", n. Etym: [F. limacon, lit., a snail.] (Geom.) Defn: A curve of the fourth degree, invented by Pascal. Its polar equation is r = a cos + b.