flatwise

Then came the fat oblong envelope, with its official seal, that dropped flatwise to the floor with a sodden, dull impact.

Instead of living edgewise, so to speak, we should be spread out flatwise.

A large arrow-head of chalcedony has been bound with cords of cotton flatwise along one side of the body.

Placing it flatwise on supports close to its ends we find that its own weight causes a decided sag.

Morrison's sword held flatwise, thudded down on the back of a man who had flung away his gun.