Portuguese has a great number of allophones of such as , , , , , and , the latter three ones can be used only in certain contexts ( and as ; in the syllable coda, as an allophone of according to the European Portuguese norm and according to the Brazilian Portuguese norm). Usually at least two of them are present in a single dialect, such as Rio de Janeiro's , , and, for a few speakers, . Other systems The International Phonetic Alphabet uses several variations of the letter to represent the different rhotic consonants; represents the alveolar trill. Related characters Descendants and related characters in the Latin alphabet R with diacritics: Ŕ ŕ Ɍ ɍ Ř ř Ŗ ŗ Ṙ ṙ Ȑ ȑ Ȓ ȓ Ṛ ṛ Ṝ ṝ Ṟ ṟ Ꞧ ꞧ Ɽ ɽ R̃ r̃ ᵲ ꭨ ᵳ ᶉ International Phonetic Alphabet-specific symbols related to R: ʶ ˞ ʴ IPA superscript letters: 𐞦 𐞧 𐞨 𐞩 𐞪 Obsolete and nonstandard symbols in the International Phonetic Alphabet: ɼ ɿ Uralic Phonetic Alphabet-specific symbols related to R: Teuthonista phonetic transcription-specific symbols related to R: Anthropos phonetic transcription: Otto Bremer's phonetic transcription: 𝼨 : R with mid-height left hook was used by the British and Foreign Bible Society in the early 20th century for romanization of the Malayalam language. ⱹ : Turned r with tail is used in the Swedish Dialect Alphabet Other variations of R used for phonetic transcription: 𝼕 𝼖 Calligraphic variants in the Latin alphabet Ꝛ ꝛ : R rotunda Ꞃ ꞃ : "Insular" R (Gaelic type) ᫍ : Combining insular r was used in the Ormulum Ancestors and siblings in other alphabets 𐤓 : Semitic letter Resh, from which the following letters derive Ρ ρ : Greek letter Rho, from which the following letters derive 𐌓 : Old Italic letter R, the ancestor of modern Latin R ᚱ : Runic letter Raido Р р : Cyrillic letter Er 𐍂 : Gothic letter Reda Abbreviations, signs and symbols ℟ : symbol for "response" in liturgy : Medical prescription Rx ® : Registered trademark symbol ₹ : Indian rupee sign Encoding 1 See also Guttural R References External links ISO basic Latin letters