cardioid

[ kahr-dee-oid ]
/ ˈkɑr diˌɔɪd /

noun Mathematics.

a somewhat heart-shaped curve, being the path of a point on a circle that rolls externally, without slipping, on another equal circle. Equation: r = a(1−cosA).

Origin of cardioid

First recorded in 1745–55, cardioid is from the Greek word kardioeidḗs heart-shaped. See cardi-, -oid

Words nearby cardioid

cardiogenic, cardiogenic shock, cardiogram, cardiograph, cardiohepatic, cardioid, cardioinhibitory, cardiokinetic, cardiokymogram, cardiokymograph, cardiolipin

British Dictionary definitions for cardioid

cardioid
/ (ˈkɑːdɪˌɔɪd) /

noun

a heart-shaped curve generated by a fixed point on a circle as it rolls around another fixed circle of equal radius, a. Equation: r = a (1 – cos φ), where r is the radius vector and φ is the polar angle

Scientific definitions for cardioid

cardioid
[ kär′dē-oid′ ]

A heart-shaped plane curve, the locus of a fixed point on a circle that rolls on the circumference of another circle with the same radius.