graffiti(drawings on a surface) noun [UK: ɡrə.ˈfiː.tiː] [US: ɡrə.ˈfiː.ti]John doesn't know who wrote the graffiti on the wall. = John no sabe quién escribió el grafiti en la pared.
carbón grafitizado noun {m}
activated carbon [activated carbons](absorbent form of finely powdered carbon) noun [UK: ˈæk.tɪ.veɪ.tɪd ˈkɑː.bən] [US: ˈæk.tɪ.ˌve.təd ˈkɑːr.bən]