Dirt, or a stain.
A chirp of radiation power from an astronomical body that has a smeared appearance on its plot in the time-frequency plane (usually associated with massive bodies orbiting supermassive black holes)
A stain on somebody's reputation.
To harm the reputation of; to smear or slander.
To dirty; to make dirty.
A small spot or speck on the skin, plumage or foliage.
Kind; sort.
A cluster of interchromatin granules in a nucleus.
The random distribution of light when it is scattered by a rough surface.
To mark with speckles.