ʳ

ʳ	U+02B3, ʳ MODIFIER LETTER SMALL R

See also: ᵣ [U+1D63 LATIN SUBSCRIPT SMALL LETTER R]

Translingual

ʳ

(IPA) alveolar trill release of a plosive (e.g. [dʳ], sometimes implying an affricate [d͜r]); or a weak, fleeting or epenthetic [r].
(IPA, obsolete) [ɹ]-colouring of a vowel, or an [ɹ]-offglide of a vowel.

Use of ⟨Vʳ⟩ for non-trilled rhotic vowels is obsolete. ⟨V˞⟩ (vowel with hook diacritic) is now standard. See usage notes at ⟨ʴ⟩.

ʳ

(nonstandard, chiefly where HTML-marking of superscription is unavailable) Used to represent a superscript r.

The Unicode Standard^[1] recommends against the use of superscript modifier letters to represent stylistically superscript text.^[2]

^ Julie D. Allen et al. (editors), The Unicode Standard: Version 6.0 – Core Specification (February 2011, Unicode Consortium, →ISBN, chapter 7: “European Alphabetic Scripts”, § 7.8: ‘Modifier Letters’, page 229:
^ Superscript modifier letters are intended for cases where the letters carry a specific meaning, as in phonetic transcription systems, and are not a substitute for generic styling mechanisms for superscripting of text, as for footnotes, mathematical and chemical expressions, and the like.