cardioid

noun, adj — 3 senses

cardioid

noun

Etymology By surface analysis, cardi- + -oid.

1

Geometry, Mathematics, Sciences An epicycloid with exactly one cusp; the plane curve with polar equation ρ=1+ cos ,θ - approximately heart-shaped

Derived terms: subcardioid

cardioid

adj

Etymology By surface analysis, cardi- + -oid.

1

Having this characteristic shape

2

Of a microphone sensitive in front, but not behind or at the sides

Derived terms: cardioid catacaustic, cardioid condenser, cardioid coordinate, cardioid evolute, cardioid inverse curve, cardioid involute, cardioid microphone, hypercardioid, supercardioid

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.