shim
Pronunciation: (shim), [key]
— n., v., shimmed, shim•ming.
—n.
- a thin slip or wedge of metal, wood, etc., for driving into crevices, as between machine parts to compensate for wear, or beneath bedplates, large stones, etc., to level them.
—v.t.
- to fill out or bring to a level by inserting a shim or shims.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.