graphite

Từ điển Oxford Advanced Learner 8th

graph·ite [graphite graphites] BrE [ˈɡræfaɪt] NAmE [ˈɡræfaɪt] noun uncountable
a soft black mineral that is a form of ↑carbon. Graphite is used to make pencils, to ↑lubricate machinery, and in nuclear ↑reactors.

Word Origin:
late 18th cent.: coined in German (Graphit), from Greek graphein ‘write’ (because of its use as pencil “lead”).

• Từ đồng nghĩa / Synonyms:
  black lead, plumbago