whalebone

whalebone
n [U] thin hard springy substance found in the upper jaw of some types of whale, used (esp formerly) for stiffening garments, eg corsets 鲸须, 须板（某些鲸类种群上颌的角质薄片, 用以支撑服装, 尤指旧时用的, 如紧身内衣中的）.

牛津英汉双解词典