graph·ite /ˈgræfˌaɪt/ 名詞
Graph·ite n. Min. 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.
Graphite battery Elec., a voltaic battery consisting of zinc and carbon in sulphuric acid, or other exciting liquid.
n : used as a lubricant and as a moderator in nuclear reactors
[syn: black lead, plumbago]