noun
rolling board; pastry board
A flat board used for rolling out dough for noodles, bread, mochi, and other pastries.
うどんを作るときは、のし板の上で生地を薄く伸ばします。
When making udon, you roll the dough out thin on a rolling board.
麺棒 is a rolling pin, often used together with のし板.
Compound of 伸し (のし, 'stretching/rolling') + 板 (いた, 'board').