People or things that scatter, or spread out in different directions.
Scatterers can be things like seeds or people running away. It means they are not staying together.
Examples:
The scatterers spread out all over the field.
The wind carries the scatterers far away.
The scatterers go in all directions.
The scatterers are like stars in the sky, all spread out.
The scatterers are everywhere, you can't catch them all.
The scatterers make the ground look like a colorful carpet.