carbon black, lampblack, soot, smut, crock -- (a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink)
smut -- (destructive diseases of plants (especially cereal grasses) caused by fungi that produce black powdery masses of spores)
smut, smut fungus -- (any fungus of the order Ustilaginales)
pornography, porno, porn, erotica, smut -- (creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire)
Overview of verb smut
The verb smut has 4 senses
smut -- (make obscene; "This line in the play smuts the entire act")
smut -- (stain with a dirty substance, such as soot)
smut -- (become affected with smut; "the corn smutted and could not be eaten")
smut -- (affect with smut or mildew, as of a crop such as corn)