儿化 érhuà
[suffixation of a nonsyllabic r to nouns and sometimes verbs,causing a retroflexion of the preceding vowel,typical of the pronunciation of standard Chinese and of some dialects] 普通话和某些方言中的一种语音现象。后缀“儿”字不自成音节,而和前头的音节合在一起,使前一音节的韵母成为卷舌韵母
一字后附「儿」字语尾,读时「儿」与前字相拼,成卷舌韵,相拼时有种种变化,称为「儿化」。如圈儿不读作ㄑㄩㄢㄦˊ而读作ㄑㄩㄚㄦ,牌儿不读作ㄆㄞㄦˊ而读作ㄆㄚˊㄦ。
英语 nonsyllabic final r 儿 added to a word in spoken Chinese, also called retroflex final or r-ization