clearance
clear·ance
noun \ˈklir-ən(t)s\Definition of CLEARANCE
: the volume of blood or plasma that could be freed of a specified constituent in a specified time (usually one minute) by excretion of the constituent into the urine through the kidneys—called also renal clearance
Learn More About
Seen & Heard 
What made you want to look up clearance? Please tell us where you read or heard it (including the quote, if possible).
