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.
© Webster 1913.