Abbreviation of fluid ounce(s).

In the field of human-computer interaction, a research experiment in which subjects interact with a computer system that they believe to be autonomous, but which is actually being operated by an unseen human being.

plural of Wizard of Oz experiment

A region of the stratosphere, between 15 and 30 kilometres in altitude, containing a relatively high concentration of ozone, which absorbs most solar ultraviolet radiation.

(inorganic chemistry) An allotrope of oxygen (symbol O₃) having three atoms in the molecule instead of the usual two; it is a toxic gas, generated from oxygen by electrical discharge.

(transitive) To treat with ozone.

(sumo) A sumo wrestler ranking below yokozuna and above sekiwake; champion.

A region of the stratosphere over Antarctica (and a smaller one over the Arctic) that is depleted of ozone in the local spring.

not containing substances (such as CFCs) that that are destructive to the ozone layer

A large river in northwestern Iran. It originates from the mountains of Kurdistan and discharges to the Caspian Sea.