Adverb
In a perpendicular manner; vertically.
Source: Webster's dictionarythis red line runs perpendicularly to the green line Source: Internet
An equivalent condition is that opposite sides are parallel (a square is a parallelogram), that the diagonals perpendicularly bisect each other, and are of equal length. Source: Internet
An equivalent condition is that the diagonals perpendicularly bisect each other. Source: Internet
By shifting the nostrils to the top of the head, the nasal passages extend perpendicularly through the skull. Source: Internet
Alternatively, : where F ⊥ is the amount of force directed perpendicularly to the position of the particle. Source: Internet
For light traveling perpendicularly to the optical axis the beams will have the same direction. Source: Internet