The point of intersection of the three perpendiculars drawn from the vertices of a triangle to the opposite sides.
Mid 19th century. From ortho- + centre.
Mid 19th century. From ortho- + centre [adjective].
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。