Medical Definition of angiosperm. : any of a class (Angiospermae) of vascular plants (as orchids or roses) that have the seeds in a closed ovary and include the monocotyledons and dicotyledonsâcompare gymnosperm.
Bilirubin (formerly referred to as haematoidin) is the yellow breakdown product of normal heme catabolism, caused by the body's clearance of aged red blood cells which contain hemoglobin. Bilirubin is excreted in bile and urine, and elevated levels may indicate certain diseases.
Before getting into the details of what high bilirubin in urine indicates, it is important to first understand exactly what bilirubin is. Bilirubin is primarily a pigment that is the end product of the breakdown of red blood cells within the liver.