\Grain"er\, n.
1. An infusion of pigeon's dung used by tanners to neutralize
   the effects of lime and give flexibility to skins; --
   called also {grains} and {bate.}
2. A knife for taking the hair off skins.
3. One who paints in imitation of the grain of wood, marble,
   etc.; also, the brush or tool used in graining.