Calyx is a botanical term that refers to the outermost whorl of a flower, typically consisting of green leaf-like structures called sepals. The primary function of the calyx is to protect the developing flower bud before it blooms. In many plants, the calyx can also play a role in attracting pollinators. In addition to its botanical significance, "Calyx" can refer to various products and organizations. For example, Calyx Institute is a nonprofit organization focused on providing access to telecommunications services. The term is also used in technology, such as in CalyxOS, an open-source operating system designed for privacy and security on mobile devices.