资料来源 : pyDict

月经困难

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Dysmenorrhea \Dys*men`or*rhe"a\, n. [Gr. ? ill, hard + ? month +
   ? to flow.] (Med.)
   Difficult and painful menstruation.

资料来源 : WordNet®

dysmenorrhea
     n : painful menstruation