The Carolina redroot, Lachnanthes caroliniana (formerly L. tinctoria), the rhizome and roots of which have been used as the source of a red dye.
Mid 19th century; earliest use found in Scientific American.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。