O3

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  ozone \o"zone\ ([=o]"z[=o]n or [-o]*z[=o]n"), n. [Gr. 'o`zwn
     smelling, p. pr. of 'o`zein to smell. See {Odor}.] (Chem.)
     A colorless gaseous substance ({O3}) obtained (as by the
     silent discharge of electricity in oxygen) as an allotropic
     form of oxygen, containing three atoms in the molecule. It is
     a strong oxidizer, and probably exists in the air, though by


     the ordinary tests it is liable to be confused with certain
     other substances, as hydrogen dioxide, or certain oxides of
     nitrogen. It derives its name from its peculiar odor, which
     resembles that of weak chlorine.
     [1913 Webster]