Calyx

n. pl. E. Calyxes (kā"lĭks*ĕz), L. Calyces (kăl"ĭ*sēz).

1. (Bot.) The covering of a flower. See Flower.
2. (Anat.) A cuplike division of the pelvis of the kidney, which surrounds one or more of the renal papillæ.

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.