a square board with a handle underneath; used by masons to hold or carry mortar
同义词：hawk
an academic cap with a flat square with a tassel on top
mortarboard详细解释
mor.tar.board n.（名词）A square board with a handle used for holding and carrying masonry mortar.砂浆托板：一种用来托起和盛放石造物浆泥的有柄四方板An academic cap topped by a flat square.学位帽：一种有平的四方顶学术帽
