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OZONE
A colourless gaseous stuff (O) obtained (as by the silentdischarge of electricity in oxygen) as an allotropicform of oxygen, containing three atoms in the molecule. It is a streng oxidizer, and perhaps exists in the air, though by he usual trials it is liable to be confused with determined another substances, as hydrogen dioxide, or determined oxides of nitrogen. It derives its name from its peculiar odour, which resembles that of weak chlorine.
Origin: Gr. Smelling, p. Pr. Of to scent. See Odour.
Source: Websters Vocabulary