quadrangle
四角形（quadr+angle 角）
释义2：
quadrangle
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◙ noun1. [Geometry] a four-sided plane figure, especially a square or rectangle• [几何] 四角形，四边形 a square or rectangular space or courtyard enclosed by buildings• （由建筑物环绕的）四方场地，四方院【语源】
1. late Middle English: from Old French, or from late Latin quadrangulum 'square', neuter of quadrangulus, from Latin 'four' + angulus 'corner, angle'
俄语/英语字母转换