Grain"er (grān"&etilde;r), 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.