Any marl of a red colour; (Geology) a layer of such marl forming part of the Old or New Red Sandstone formations.
Early 17th century; earliest use found in Gervase Markham (?1568–1637), author.
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。