graphite

American  

[graf-ahyt] / ˈgræf aɪt /

noun

1. a very common mineral, soft native carbon, occurring in black to dark-gray foliated masses, with metallic luster and greasy feel: used for pencil leads, as a lubricant, and for making crucibles and other refractories; plumbago; black lead.

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graphite British  

/ ˈɡræfaɪt, ɡrəˈfɪtɪk /

noun

1. Also called: plumbago.  a blackish soft allotropic form of carbon in hexagonal crystalline form: used in pencils, crucibles, and electrodes, as a lubricant, as a moderator in nuclear reactors, and, in a carbon fibre form, as a tough lightweight material for sporting equipment

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graphite Scientific  

/ grăf′īt′ /

1. A naturally occurring, steel-gray to black, crystalline form of carbon. The carbon atoms in graphite are strongly bonded together in sheets. Because the bonds between the sheets are weak, other atoms can easily fit between them, causing graphite to be soft and slippery to the touch. Graphite is used in pencils and paints and as a lubricant and electrode. It is also used to control chain reactions in nuclear reactors because of its ability to absorb neutrons.

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Other Word Forms

• graphitic
  adjective
• nongraphitic
  adjective

Etymology

Origin of graphite

1790–1800; < German Graphit < Greek gráph ( ein ) to write, draw + German -it -ite ¹

Explanation

Use the noun graphite when you're talking about the mineral that's used to make pencil lead. Graphite is a form of carbon that is most commonly found in pencils, although because it is a good conductor of electricity, it's also used in electrodes and batteries. Graphite can in fact be found in a wide variety of things, from a car's brake pads to industrial lubricants. The word graphite comes from the German Graphit, which was named by a mineralogist in 1789 from the Greek word graphein, "write."

Example Sentences

See Examples For:

graphite

Canada also has significant reserves of critical minerals like lithium, nickel and graphite.

From BBC ● Aug. 25, 2026

The system combines improved heat transfer with porous graphite felt that can reach temperatures above 2,550 degrees Fahrenheit.

From Science Daily ● Aug. 23, 2026

Syria also procured large amounts of graphite needed to keep the nuclear reactions in the reactor steady.

From The Wall Street Journal ● Aug. 18, 2026

The sodium-based material pulled sodium from the water, while a graphite electrode removed chloride.

From Science Daily ● Aug. 1, 2026

Your pencil—mechanical, size .7 mm graphite only—glides across the paper.

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith

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