em·ery /ˈɛmri, ˈɛmə-/
 金剛砂


 em·ery /ˈɛm(ə)rɪ/ 名詞
 金剛砂,剛玉砂


 Em·er·y n.  Min. Corundum in the form of grains or powder, used in the arts for grinding and polishing hard substances. Native emery is mixed with more or less magnetic iron. See the Note under Corundum.
 Emery board, cardboard pulp mixed with emery and molded into convenient.
 Emery cloth or Emery paper, cloth or paper on which the powder of emery is spread and glued for scouring and polishing.
 Emery wheel, a wheel containing emery, or having a surface of emery.  In machine shops, it is sometimes called a buff wheel, and by the manufacturers of cutlery, a glazer.

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 emery
      n : a hard gary-black mineral consisting of corundum and either
          hematite or magnetite; used as an abrasive (especially as
          a coating on paper)