Hypertext Webster Gateway: "toxicity"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Toxicity \Tox*ic"i*ty\, n.
The quality or state of being toxic or poisonous;
poisonousness.
From WordNet (r) 1.7 (wn)
toxicity
n 1: the degree to which something is poisonous
2: grave harmfulness or deadliness [syn: {perniciousness}]
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