ozone

Noun
  1. 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) (synset 114997366)
    is a type of: gas - a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
    substance holonym: atomic number 8, o, oxygen - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust

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