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.
In the figure above, an angle from each pair of vertical angles are adjacent angles and are supplementary (add to 180Â°). For example, in the figure above, 'Vertical' has come to mean 'upright', or the opposite of horizontal. But here, it has more to do with the word 'vertex'.