In the IPA, a rhotic vowel (aka R-coloured vowel, retroflex vowel, vocalic r or rhotacised vowel) is indicated by the affixing of a hook diacritic ( ˞ ) to the right of the regular symbol for the vowel. The rhotic consonants are /r/, /ɾ/, /ɹ/, /ɻ/, /ʀ/, /ʁ/, /ɽ/ and /ɺ/.