tu·mes·cence /tuˈmɛsṇ(t)s, tju-/
  腫起;腫脹
  tu·mes·cence /t(j)uˈmɛsṇ(t)s/ 名詞
  腫脹,腫大
  Tu·mes·cence n.  The act of becoming tumid; the state of being swollen; intumescence; -- applied especially to the state of swelling of the vascular tissue in the male and female sex organs when they have been stimulated to readiness for sexual intercourse.
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  tumescence
       n : tumidity resulting from the presence of blood or other fluid
           in the tissues