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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 perniciousness
 危害性

From: Webster's Revised Unabridged Dictionary (1913)

 Per·ni·cious, a.  Having the quality of injuring or killing; destructive; very mischievous; baleful; malicious; wicked.
 Let this pernicious hour
 Stand aye accursed in the calendar.   --Shak.
    Pernicious to his health.   --Prescott.
 Syn: -- Destructive; ruinous; deadly; noxious; injurious; baneful; deleterious; hurtful; mischievous.
 -- Per*ni*cious*ly, adv., -- Per*ni*cious*ness, n.
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From: WordNet (r) 2.0

 perniciousness
      n : grave harmfulness or deadliness [syn: toxicity]