牡蠣かき灰ばい

noun

oyster shell lime

Lime made by burning oyster shells; used historically in plaster, mortar, and as a whitewash.

• 昔むかしの日本にほん建けん築ちくでは、壁かべに牡蠣かき灰ばいが使つかわれていた。

  In old Japanese architecture, oyster shell lime was used for walls.