(n) a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)
(n) a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun, Syn.ozonosphere
(n) illness that can occur to persons exposed to ozone in high-altitude aircraft; characterized by sleepiness and headache and chest pains and itchiness
The Collaborative International Dictionary of English (GCIDE) v.0.53
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 ]
. (Chem.) Paper coated with starch and potassium iodine, also called starch-iodide paper. It turns blue when exposed to ozone. [ Webster 1913 Suppl. +PJC ]
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