modesty board; screening panel
A panel attached to the front of a desk or table to hide the legs and provide privacy; commonly used in reception counters, study desks, and office furniture.
The reception counter has a modesty board so that the lower part is not visible.
This study desk has a screening panel, so you can concentrate on studying.
Compound of 幕 (curtain, screen) and 板 (board, plank). The exact derivation is uncertain, but the term likely refers to a board that acts as a screen.