In Thai Language Called "Fuk-Bau" (ฝักบัว)
English --> the calyx of the water lily / a stork of the genus Pseudotantulus


Lotus seeds or nuts (called liánzĭ, 蓮子; or xian liánzĭ, 鲜莲子, in Chinese) are quite versatile, and can be eaten raw or dried and popped like popcorn, phool makhana. They can also be boiled until soft and made into a paste, or boiled with dried longans and rock sugar to make a tong sui (sweet soup). Combined with sugar, lotus seed paste becomes one of the most common ingredients used in pastries such as mooncakes, daifuku, and rice flour pudding.

Various parts of the lotus are also used in traditional Asian herbal medicine.

Reference - en.wikipedia.org/wiki/Nelumbo_nucifera