renal pelvis

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The hollow funnel in the outlet of the kidney, into which urine is discharged before entering the ureter.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun anatomy The funnel-like dilated proximal part of the ureter in the kidney.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter