Lie on a bench but perpendicular to it.
It was basically perpendicular to his body.
Weft In woven fabric, the filling yarns that run perpendicular to the warp yarns.
Google tells me direct illumination to a surface perpendicular to incoming full intensity sunlight is about 1.
Inhale as you lift your legs until they are perpendicular with the floor.
Bend your knees slowly until your thighs are perpendicular with your legs.
The axis of rotation for every planet other than Uranus is roughly perpendicular with their orbital plane.
It takes you up an incline as steep as one in two, almost perpendicular at some points.