noun
cloud-shaped bronze gong; umpan
A flat, cloud-shaped bronze gong used in Zen Buddhist temples to signal meal times and other events.
禅寺では、食事の時間を知らせるために雲板を打ち鳴らす。
In Zen temples, they strike the umpan to signal mealtime.
From Chinese 雲板 (yúnbǎn), literally 'cloud board', referring to its shape.