1 Higher doses can cause impairment of memory, judgment and coordination, irritability, paranoia,3 and suicidal thoughts. Some people experience the opposite of the intended effect, such as agitation or aggression.
Adj. 1. vertical-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. perpendicular.
Vertical Motion is a change in altititude (height). Horizonal Motion is a change in ground track position (i.e., a change in what spot the object is directly over). Often, an object's motion has both a vertical component and a horizontal component (for example when it does diagonally up or diagonally down).