erup·tive /-tɪv/ 形容詞
  疹的,長出的,萌出的
  E·rup·tive a.
  1. Breaking out or bursting forth.
  The sudden glance
  Appears far south eruptive through the cloud.   --Thomson.
  2. Med. Attended with eruption or efflorescence, or producing it; as, an eruptive fever.
  3. Geol. Produced by eruption; as, eruptive rocks, such as the igneous or volcanic.
  E·rup·tive, n. Geol. An eruptive rock.
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  eruptive
       adj 1: igneous rock produced by eruption and solidified on or near
              the earth's surface; rhyolite or andesite or basalt;
              "volcanic rock includes the volcanic glass obsidian"
              [syn: volcanic]
       2: of igneous rock that has solidified beneath the earth's
          surface; granite or diorite or gabbro [syn: irruptive, plutonic]
       3: erupting or tending to erupt; "a geyser is an intermittently
          eruptive hot spring"