A number or expression that is set lower than the baseline and slightly smaller, to act as an inferior or subscript.
Any combination of:
... <p>This article by Peter Wilmshurst (10 October 1998, pp 996-9) used the incorrect abbreviation for inspired partial pressure of oxygen. The abbreviation should have been Pi<sc>o</sc><sub>2</sub> not Fi<sc>o</sc><sub>2</sub>.</p> ...
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