The ash tree Fraxinus quadrangulata, which is chiefly native to the Midwestern United States, and of which the inner bark has been used as a blue dye.
Late 18th century.
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。