calyx

noun6

1. •
   The outermost whorl of flower parts, comprising the sepals, which covers and protects the petals as they develop.
2. •
   Any of various cup-like structures.
3. •
   A chamber in the mammalian kidney through which urine passes.
4. •
   The crown containing the viscera of crinoids and similar echinoderms, entoprocts, and the polyps of some cnidarians.
5. •
   A funnel-shaped expansion of the vas deferens or oviduct of insects.
6. •
   A flattened cap of neuropil in the brain of insects.