perpendicular

a straight line at right angles to another line

a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting

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

an extremely steep face

intersecting at or forming right angles; "the axes are perpendicular to each other"

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"

extremely steep; "the great perpendicular face of the cliff"