Final answer:
The combining form men/o in dysmenorrhea means the uterus or the function of menstruation, specifically referring to painful or difficult menstrual flow.
Step-by-step explanation:
The combining form men/o in the term dysmenorrhea refers to the uterus or the function of menstruation.
Dysmenorrhea is a condition characterized by severe menstrual pain and cramps. The term is derived from the Greek words dys meaning difficult or painful, meno meaning month, and rrhea meaning flow. Therefore, dysmenorrhea means painful or difficult menstrual flow.
For example, in endometriosis, a condition where endometrial tissue grows outside the uterus, the presence of this tissue can lead to painful menstruation or dysmenorrhea.