01 a. Breaking out or bursting forth.
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1.
Breaking out or bursting forth.“The sudden glance Appears far south eruptive through the cloud.” — Thomson.
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2.
Attended with eruption or efflorescence, or producing it; as, an eruptive fever.(Med.)
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3.
Produced by eruption; as, eruptive rocks, such as the igneous or volcanic.(Geol.)