Emery is a hard, rough mineral that is put on paper or cloth and used for cleaning or polishing things.
File across the tips of each nail with an emery board to smooth the edges.
emery in British English
(ˈɛmərɪ)
noun
a.
a hard greyish-black mineral consisting of corundum with either magnetite or haematite: used as an abrasive and polishing agent, esp as a coating on paper, cloth, etc. Formula: Al2O3
b.
(as modifier)
emery paper
Word origin
C15: from Old French esmeril, ultimately from Greek smuris powder for rubbing
emery in American English
(ˈɛməri)
noun
a dark, impure, coarse variety of corundum used for grinding, polishing, etc.
Word origin
Fr émeri < OFr emeril < It smeriglio < MGr smeri, for Gr smyris, emery < IE base *smer-, smear