alkapton
/ælˈkæptɑn/
noun
- A chemical substance that builds up in the body due to a rare genetic disorder, causing urine to turn dark when exposed to air.
- Doctors tested for alkapton by leaving a urine sample exposed to air.
- The presence of alkapton in the urine can be a sign of a metabolic condition.
- Alkapton buildup can lead to a condition called ochronosis, which affects joints.