expandable metal or wooden wedge used by printers to lock up a form within a chase
同义词：coign??/??coigne
the keystone of an arch
(architecture) solid exterior angle of a building; especially one formed by a cornerstone
同义词：corner
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。