To save this word, you'll need to log in.
Medical Definition of renal sinus
: the main cavity of the kidney that is an expansion behind the hilum and contains the renal pelvis, calyxes, and the major renal vessels
Comments on renal sinus
What made you want to look up renal sinus? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
The Eponym Quiz
- Which is the best synonym of bowdlerize?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- The Eponym Quiz
Do you know these words that come from names?
Take the quiz - Liar, Liar Quiz
Test your knowledge of words for lies, liars, and those being lied to. In other words, everyone.
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Bee Cubed
Listen to the words and spell through all three levels.
Play the game
Share renal sinus