na-adjective, noun which may take the genitive case particle 'no', noun
vertical; perpendicular; upright
Technical term used in physics, engineering, and mathematics to describe a direction exactly aligned with gravity or a line perpendicular to a horizontal plane. More precise than 垂直, which can mean perpendicular to any surface.
This pillar stands perfectly vertical.
Please calculate the force in the vertical direction.
vertical circle
vertical line; plumb line
vertical plane
Compound of 鉛 (lead, the metal) and 直 (straight), referring to a plumb line used to determine the vertical direction.