slowing down.
The correct spelling of the noun is deceleration (slowing down process).
its when something is slowing down
Gradually slowing down is 'decelerating'.
slowing down till the end
Slowing Down the World was created on 1999-06-22.
This would indicate negative acceleration, which would mean that the object in question is speeding up.
It is not at rest.
slowing down
1989 Toyota tercel car dies when stopping or slowing down
its when something is slowing down
By slowing the molecules down