erup·tion /ɪˈrʌpʃən/
  爆發,火山灰,出疹
  erup·tion /ɪˈrəpʃən/ 名詞
  疹,長出,穿孔器官突生柄狀物(真菌)
  e·rup·tion n.
  1. The act of breaking out or bursting forth; as: (a) A violent throwing out of flames, lava, etc., as from a volcano or a fissure in the earth's crust. (b) A sudden and overwhelming hostile movement of armed men from one country to another. --Milton. (c) A violent commotion.
     All Paris was quiet . . . to gather fresh strength for the next day's eruption.   --W. Irving.
  2. That which bursts forth.
  3. A violent exclamation; ejaculation.
     He would . . . break out into bitter and passionate eruditions.   --Sir H. Wotton.
  4. Med. The breaking out of pimples, or an efflorescence, as in measles, scarlatina, etc.
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  eruption
       n 1: the sudden occurrence of a violent discharge of steam and
            volcanic material [syn: volcanic eruption]
       2: symptom consisting of a breaking out and becoming visible
       3: (of volcanos) pouring out fumes or lava (or a deposit so
          formed) [syn: eructation, extravasation]
       4: a sudden violent spontaneous occurrence (usually of some
          undesirable condition); "the outbreak of hostilities"
          [syn: outbreak, irruption]
       5: a sudden very loud noise [syn: bang, clap, blast, loud
          noise]
       6: the emergence of a tooth as it breaks through the gum