graphite

/G R AE1 F AY0 T/
noun
  1. 1

    An allotrope of carbon, consisting of planes of carbon atoms arranged in hexagonal arrays with the planes stacked loosely, that is used as a dry lubricant and in "lead" pencils.

  2. 2

    Short for graphite-reinforced plastic, a composite plastic made with graphite fibers noted for light weight strength and stiffness.

    Modern tennis racquets are made of graphite, fibreglass and other man-made materials.

  3. 3

    A grey colour.

Source: https://en.wiktionary.org/wiki/graphite