Final answer:
Dysmenorrhea is the clinical term that means painful menstrual flow. It is characterized by cramping and pain before and during menstruation.
Step-by-step explanation:
The clinical term that means painful menstrual flow is Dysmenorrhea. Dysmenorrhea is characterized by cramping and pain before and during menstruation. Some women experience severe uterine cramps during their menstrual flow. It is important to note that dysmenorrhea can be caused by various factors, including endometriosis and pelvic inflammatory disease.