cardioid cardiohepatic • cardioid microphone · · · Info · Definitions · Characters · · cardioid · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) an epicycloid in which the rolling circle equals the fixed circle. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072