Definition from Wiktionary, the free dictionary
- erhua (refers to the r-coloring or addition of the "ér"(儿) sound (transcribed in IPA as /ɚ/) to syllables in spoken Mandarin Chinese)
Erhua is mainly used in Beijing and northern dialects.
This pronouciation is not standard Mandarin. But there is some case where the Erhua is used in standard Mandarin.
In some case, the Erhua can change the meaning of a word.