calyx \ca"lyx\ k=a"li^ks; 277, n.; pl. e. calyxes
   k=a"li^kse^z, l. calyces ka^l"i^s=ez. l.
   calyx, -ycis, fr. gr. ka`lyx husk, shell, calyx, from the
   root of kaly`ptein to cover, conceal. cf. chalice helmet.
   1. bot. the covering of a flower. see flower.
      1913 webster

   note: 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.
         1913 webster

   2. anat. a cuplike division of the pelvis of the kidney,
      which surrounds one or more of the renal papillae.
      1913 webster
see also:
calyxes calyces chalice helmet flower