vertical direction (Q182167)
direction that is perpendicular to the horizontal plane; direction connecting "up" and "down"
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other details
aliases vertical
 up-down axis
 up/down axis
 z-axis
description direction that is perpendicular to the horizontal plane; direction connecting "up" and "down"

External Links
(P646) /m/0dpl4v
(P1296) 0217381
(P2581) 03350326n
(P2671) /g/11bc585rgb
(P2812) Vertical
(P6366) 49661696
(P8408) VerticalDirection
(P8834) vertical
(P12086) Verticaal
(P12385) vertical-0