graphite
/ˈgræfaɪt/noun
mass noun
- a grey crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors石墨。
派生词
graphitic
adjective词源
late 18th cent.: coined in German （Graphit）, from Greek graphein 'write' （because of its use as pencil'lead'）.