menorrhagia: abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged
symptom: (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease
popper: British philosopher (born in Austria) who argued that scientific theories can never be proved to be true, but are tested by attempts to falsify them (1902-1994)