WordNet: black lead, graphite, plumbago

used as a lubricant and as a moderator in nuclear reactors

• hypernym C, atomic number 6, carbon

• hyponym lead, pencil lead

• hyponym pencil

black lead

• (suomi) grafiitti (synonyymi)

graphite

• (suomi) grafiitti (synonyymi)

plumbago

• (suomi) plumbago (synonyymi)