Calyx

Origin

Latin calyx, from Ancient Greek κάλυξ (kalux, "case of a bud, husk").

Full definition of calyx

Noun

1. (anatomy) A cup-like structure in the mammalian kidney.
2. (botany) The outermost whorl of flower parts, comprising the sepals, when it is not the same in appearance as the next such whorl (the corolla).
3. (zoology) The crown of a crinoid.