The Collaborative International Dictionary of English v.0.48:
Emery \Em"er*y\, n. [F. ['e]meri, earlier ['e]meril, It.
smeriglio, fr. Gr. ?, ?, ?, cf. ? to wipe; perh. akin to E.
smear. Cf. Emeril.] (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
Emery board, cardboard pulp mixed with emery and molded
Emery cloth or Emery paper, cloth or paper on which the
powder of emery is spread and glued for scouring and
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.