Graphite

1.

(black soft form of carbon. Graphite is used in lead pencils) ធ្យូងថ្មម្យ៉ាងផុយ (ប្រើធ្វើខ្មៅដៃ)

1.

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.