A fan-shaped bundle of isoglosses separating Low from High German in the Rhine valley.
1930s; earliest use found in Leonard Bloomfield (1887–1949), linguist. After German rheinischer Fächer.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。