Use the noun graphite when you're talking about the mineral that's used to make pencil lead.
Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, etc. Often called plumbago or black lead.
Noun
used as a lubricant and as a moderator in nuclear reactors
n.
Native carbon in hexagonal crystals, also foliated or
granular massive, of black color and metallic luster, and so soft as to
leave a trace on paper. It is used for pencils (improperly called lead
pencils), for crucibles, and as a lubricator, etc. Often called
plumbago or black lead.
Graphite
Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, etc. Often called plumbago or black lead.
Usage Examples
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