It was flat at the top and its sides rose in a perpendicular direction, against which the sea broke to a great height.

The magnetic field is constrained to the perpendicular direction, but it does not disappear.

It can also expand as the object is compressed in a perpendicular direction.

The tape and the head move at the same time in nearly perpendicular directions.

Therefore the heat transfer is enhanced along the magnetic field lines and inhibited in the perpendicular direction.

While heavily armoured, it is not built to withstand forces from perpendicular directions.

These ions are accelerated by plasma waves, in directions mainly perpendicular to the field lines.

This is done in two horizontal perpendicular directions.

A bus was then driven in a perpendicular direction.

The man pointed south, indicating the perpendicular direction of the seam.