What is "o3"

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.

O3 may refer to:

• O, the molecular formula for ozone
• O, the 1993 debut album by the techno band Sunscreem
• O3: A Trilogy, a concept album trilogy by progressive metal band Dominici
• o3 Magazine, a monthly, free-content e-zine about free software and open source
• O3 star, in stellar classification, a subclass of type O stars
• O-3, the pay grade for the following officer ranks in the U.S. uniformed services:
  • Captain in the Army, Air Force, and Marine Corps
  • Lieutenant in the Navy, Coast Guard, Public Health Service Commissioned Corps, and NOAA Commissioned Officer Corps
• O3 Entertainment, a video game publisher
• Haplogroup O3 (Y-DNA), a Y-DNA Haplogroup
• Oldershaw O-3, glider
• USS O-3 (SS-64), a United States O class submarine
• Otoyol 3, a Turkish highway from Edirne to Istanbul
• Oskarshamn 3, unit 3 at Oskarshamn Nuclear Power Plant in Sweden

fO3, the remaining three original members of Boy Scout Troop 826 ameya