Third-person singular simple present indicative form of sway.
If the straight edge distorts, sways, moves or curves in any way, the lens is flawed.
Similarly the two projecting ends of the central piece of steel which forms the fulcrum take bearing on two cheeks of the stand, between which the beam sways.
All that the age longed for seemed to be embodied in a man who had both in his own person and by inheritance the natural spell which sways the imagination of the world.
At the bottom of the vertical leg from the goods-pan there is also a projecting piece which is attached to the top of a vertical piston rod, the piston of which plays in a dash-pot of glycerin as the beam sways, and deadens the vibrations of the index arm.
Adults can create this type of soothing motion with a hammock that sways gently.