(linear algebra) diagonal element; diagonal component

(linear algebra) diagonal matrix

(geometry) opposite angle - in the quadrangles, the angle that is not the neighbour to an angle.

everything, all

a corner (e.g., of a desk; compare 隅) / an edge / a street corner

ingredient / (mathematics) entity

items that come in pairs / sets of furniture etc.

entirely; all

a line or queue, a procession in single file / a ceremonial procession / (mathematics) a matrix

line; queue; procession / matrix; array