a square board with a handle underneath; used by masons to hold or carry mortar
同义词：mortarboard??/??hawk
an academic cap with a flat square with a tassel on top
同义词：mortarboard
英汉双解词典包含3185865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。