Something that abrades; a tool or machine for abrading.
1856, H. A. Dewar, Actuating Mechanism for Rotating Tools, Patent dated 1 March, 1856, in The Practical Mechanic’s Journal, Volume I, p. 232,
[…] provision is made for the attachment thereto of various operating tools, such, for example, as drills, saws, grindstones, polishers, and cutters, or abraders or shapers of various kinds.
2012, G. Domokos and G. W. Gibbons, “The evolution of pebble size and shape in space and time,” arXiv:1109.5707 [physics.geo-ph], p. 2,
The physical assumption underlying Firey’s model is that the abraded particle (pebble) undergoes a series of small collisions with a very large, smooth abrader, and this might be the case when pebbles are carried by a fast river and collied repeatedly with the riverbed […]
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