
In tectonics, vertical displacement is the shifting of land in a vertical direction, resulting in a permanent change in elevation. Two types of vertical displacement are uplift, an increase in elevation, and subsidence, a decrease in elevation. ...
Found on
http://en.wikipedia.org/wiki/Vertical_displacement

(Learning Modules / Mathematics / Modelling projectiles) A change in position in a plane at right angles to the horizon.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
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