1. shaped like or resembling a heart

1. a heart-shaped curve traced by a point on the circumference of a circle rolling around another circle of the same radius
Usage: mathematics; geometry
2. a type of microphone with a heart-shaped pickup pattern that is most sensitive to sound from the front
Usage: audio engineering; music production

Examples

• The cardioid curve is commonly used in mathematics to demonstrate properties of rolling circles.
• A cardioid microphone is ideal for recording vocals because it rejects sound from the sides and back.
• The leaf has a cardioid shape with a slight indentation at the top.
• In polar coordinates, a cardioid can be expressed with a simple equation.
• The cardioid pickup pattern makes this microphone perfect for live performances.
• The artist drew a cardioid design as part of the abstract composition.