o-zone (n). 1. A blue gaseous allotrope of oxygen, O3, formed naturally from diatomic oxygen by electric discharge or exposure to ultraviolet radiation. It is an unstable, powerfully bleaching, poisonous oxidizing agent with a pungent, irritating odor, used to deodorize air, purify water, treat industrial wastes and as a bleach. ---------------AHD Or that slightly strange smell you sense when you have been running an electric motor for a while in a closed room. :-) Or the strong pungent smell when lightning has struck nearby!! :-( Jim Bryant (FL)
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