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 - plumb line
a Gothic style in 14th and 15th century England
characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting - perpendicular style- english gothic- english gothic architecture
a straight line at right angles to another line
Adjective
extremely steep "the great perpendicular face of the cliff"
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"
intersecting at or forming right angles "the axes are perpendicular to each other"