Final answer:
Menometrorrhagia is the medical term for rapid flow of blood from the uterus at menstruation and between menstrual cycles. It is characterized by heavy or prolonged bleeding at irregular intervals.
Step-by-step explanation:
The medical term that means rapid flow of blood from the uterus at menstruation and between menstrual cycles is menometrorrhagia. Menometrorrhagia is a condition marked by heavy or prolonged bleeding at irregular intervals. It can be caused by hormonal imbalances, uterine fibroids, cervical polyps, or other underlying conditions.