1
: a soft black lustrous form of carbon that conducts electricity and is used in lead pencils and electrolytic anodes, as a lubricant, and as a moderator in nuclear reactors
2
: a composite material in which carbon fibers are the reinforcing material

Examples of graphite in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The country is a major uranium producer with deposits of lithium, rare earths, copper and graphite. — Yinka Adegoke, semafor.com, 25 Sep. 2026 Compacted graphite iron also has a far greater fatigue limit, all while weighing less. — Caleb Jacobs, The Drive, 24 Sep. 2026 Eliminating graphite frees up space and reduces weight, potentially allowing manufacturers to build batteries with higher energy density. — Atharva Gosavi, Interesting Engineering, 22 Sep. 2026 See All Example Sentences for graphite

Word History

Etymology

German Graphit, from Greek graphein to write

First Known Use

1796, in the meaning defined at sense 1

Time Traveler
The first known use of graphite was in 1796

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Cite this Entry

“Graphite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/graphite. Accessed 1 Oct. 2026.

Kids Definition

: a soft shiny black carbon that is used in making lead pencils and as a dry lubricant

Medical Definition

: carbon of a soft black lustrous form that conducts electricity and is used in lead pencils and electrolytic anodes, as a lubricant, and as a moderator in nuclear reactors

called also plumbago

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