Found 2 items, similar to cardioid.
English → English (WordNet) Definition: cardioid cardioid n : an epicycloid in which the rolling circle equals the fixed circle
English → English (gcide) Definition: Cardioid Cardioid \Car"di*oid\, n. [Gr. kardio-eidh`s heart-shaped; kardi`a heart + e'i^dos shape.] (Math.) An algebraic curve, so called from its resemblance to a heart. [1913 Webster]