疑母（.mw-parser-output .IPA{font-family:"Charis SIL","Doulos SIL","Linux Libertine","Segoe UI","Lucida Sans Unicode","Code2000","Gentium","Gentium Alternative","TITUS Cyberbit Basic","Arial Unicode MS","IPAPANNEW","Chrysanthi Unicode","GentiumAlt","Bitstream Vera","Bitstream Cyberbit","Hiragino Kaku Gothic Pro","Lucida Grande",sans-serif;text-decoration:none!important}.mw-parser-output .IPA a:link,.mw-parser-output .IPA a:visited{text-decoration:none!important} ŋ）是中古汉语的一个声母，属牙音，浊音声母。

在北京音系中，疑母在开口呼、合口呼与撮口呼中为零声母，少数齐齿呼（牛逆虐拟等）为。

除了闽语、吴语、部分客家话、粤语之外的大部分汉语方言的疑母今读都有以下特点：

广韵查询系统-疑母