cardioid
car·di·oid
noun \ˈkär-dē-ˌȯid\Definition of CARDIOID
: a heart-shaped curve that is traced by a point on the circumference of a circle rolling completely around an equal fixed circle and has an equation in one of the forms ρ = a(1 ± cos θ) or ρ = a(1 ± sin θ) in polar coordinates
Illustration of CARDIOID
First Known Use of CARDIOID
1753
Browse
Next Word in the Dictionary: cardioid condenser
Previous Word in the Dictionary: cardiograph
All Words Near: cardioid
Previous Word in the Dictionary: cardiograph
All Words Near: cardioid
Seen & Heard 
What made you want to look up cardioid? Please tell us where you read or heard it (including the quote, if possible).
