noun
water-blooming artificial flower
A traditional Japanese craft: a paper or fabric flower that opens when placed in water, often used as a party favor or decoration.
結婚式の引き出物に水中花が入っていた。
There was a water-blooming flower among the wedding favors.
Compound of 水中 (suichū, 'underwater') + 花 (ka, 'flower'). The exact origin of the craft is uncertain, but it has been a popular Japanese novelty since at least the Edo period.