perpendicularity
perpendicularity[ noun ]- the relation of opposition between things at right angles
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- the quality of being at right angles to a given line or plane (especially the plane of the horizon)
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Perpendicularity \Per`pen*dic`u*lar"i*ty\, n. [Cf. F.
perpendicularit['e].]
The quality or state of being perpendicular.