cardioid
noun
- type of curve
Wiktionary
adj
Etymology: By surface analysis, cardi- + -oid.
- Having this characteristic shape
- sensitive in front, but not behind or at the sides
noun
Etymology: By surface analysis, cardi- + -oid.
- An epicycloid with exactly one cusp; the plane curve with polar equation ρ=1+ cos ,θ - approximately heart-shaped