rhotic

That allows the phoneme /ɹ/ even when not followed by a vowel, as in bar (/bɑːɹ/) and bard or barred (/bɑːɹd/); (of an English speaker) who speaks with such an accent.

Rhotic speech is common in Ireland, Scotland, much of the United States, Canada, West Country England, and many parts of the north and west of England.

Rhotic (or r-ful) dialects are linguistic relics in England, as shown in Map 7-5. Nonrhotic or r-less dialects have been displacing them since the seventeenth century. Among the linguistically most conservative population in England, represented by the NORMs of the SED, both rhotic and nonrhotic dialects are found throughout the country. The fact that the rhotic dialects are relics is indicated on Map 7-5 not by the predominance of nonrhotic dialects, but by the discontinuity of the regions where rhotic dialects are found. A century or so earlier, they covered even more of the country, and the three regions probably formed part of a continuous network.

Having a sound quality associated with the letter R; having the sound of any of certain IPA symbols, including /ɹ/, /ɻ/, /ɚ/, /ɝ/ and /r/.

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/.

What is normally understood by the term "trill" is a rhotic consonant of the type seen in the Spanish word perro 'dog', or the usual pronunciation of the phoneme /r/ in Parisian French.

A rhotic consonant or rhotic vowel (R-coloured vowel).

It is well known that the phonetic realization of rhotics varies considerably from language to language, even from dialect to dialect. Rhotics can be realized as flaps, taps, trills (uvular, coronal or bilabial), or as assibilated or fricative variants.

2012, Rebeka Campos-Astorkiza, 5: The Phonemes of Spanish, José Ignacio Hualde, Antxon Olarrea, Erin O'Rourke (editors), The Handbook of Hispanic Linguistics, John Wiley & Sons (Wiley-Blackwell), page 100, Spanish also has two rhotics, a tap /ɾ/(vibrante simple) and a trill /r/(vibrante múltiple).