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Related to cardioid: cardioid microphone
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The parametric equations of this cardioid are
x = -a cos θ (1 - cos θ),
y = a sin θ (1 - cos θ).


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.


(Mathematics) 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


(ˈkɑr diˌɔɪd)

a heart-shaped curve traced by a point on a circle that rolls without slipping on another equal circle. Equation: r = a (1−cosA).
[1745–55; < Greek kardioeidḗs heart-shaped]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cardioid - an epicycloid in which the rolling circle equals the fixed circlecardioid - an epicycloid in which the rolling circle equals the fixed circle
epicycloid - a line generated by a point on a circle rolling around another circle


[ˈkɑːdɪˌɔɪd] n (Math) → cardioide f
References in periodicals archive ?
Tenders are invited for Super Cardioid Dynamic Vocal Microphone For Lead And Backing Vocals, Laminated Varimotion Diaphragm Deep Drawing Process Duel Sock Mount.
C02 Stereo Pair Small Diaphragm Cardioid Condenser Microphones ($174.
The first aid was designed and programmed so that the first memory had an omnidirectional response pattern, and the second and third memories had a cardioid response pattern.
We recorded vocalizations using a parabola, a Shure Beta-58 cardioid microphone, and a Nagra-E analog recorder.
Better still, the Yeti Pro offers four recording modes - omni-directional, cardioid pattern, stereo and a bi-directional.
As Vastech, the team developed and trademarked the CardioID and KnowYourCardioID brands, and attended the Florida Chiropractors Association convention last fall with the notion of selling chiropractors on the idea.
The answer to the last question (give the mathematical name for a heart shape) is a cardioid.
3 for Xu-like points in starlike-polar c[infinity]rdinates, in the case of the cardioid r (0) = (1 - cos [theta])/2, and of the "four-leaf clover" r([theta]) = cos 2[theta].
The cross-sectional shape resembles a cardioid (rounded 'B' shape).