Source : Webster's Revised Unabridged Dictionary (1913)

Abradant \Ab*ra"dant\, n.
   A material used for grinding, as emery, sand, powdered glass,
   etc.

Source : WordNet®

abradant
     n 1: a substance that abrades or wears down [syn: {abrasive}, {abrasive
          material}]
     2: a tool or machine used for wearing down or smoothing or
        polishing [syn: {abrader}]