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an extremely steep face a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting a straight line at right angles to another line extremely steep; "the great perpendicular face of the cliff" steep intersecting at or forming right angles; "the axes are perpendicular to each other" normal, orthogonal, right a cord from which a metal weight is suspended pointing directly to the earth''s center of gravity; used to determine the vertical from a given point at right angles to the plane of the horizon or a base line; "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height" plumb, upended, upright |
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