A thin plastic or fibre sheath that is inserted into a hole in masonry in order to hold a screw.
Early 20th century: from Rawlings (the name of the engineers who introduced it) + plug.
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。