calix

/K AE1 L IH0 K S/
noun
  1. 1

    The outermost whorl of flower parts, comprising the sepals, which covers and protects the petals as they develop.

  2. 2

    Any of various cup-like structures.

Source: https://en.wiktionary.org/wiki/calix, https://en.wiktionary.org/wiki/calyx