Calyx
Calyx (kā"liks; 277) , noun
[Latin calyx, -ycis, from Greek ka`lyx husk, shell, calyx, from the root of kaly`ptein to cover, conceal. Compare Chalice Helmet.]
1.
(Botany) The covering of a flower. See Flower.
The calyx is usually green and foliaceous, but becomes delicate and petaloid in such flowers as the anemone and the four-o'clock. Each leaf of the calyx is called a sepal.
2.
(Anatomy) A cuplike division of the pelvis of the kidney, which surrounds one or more of the renal papilla.