Final answer:
Direct reading from the airspeed indicator, uncorrected for the density, installation error or instrument error is called indicated airspeed (IAS).
Step-by-step explanation:
Indicated airspeed (IAS) is the airspeed of an aircraft as measured by its pitot-static system and displayed by the airspeed indicator (ASI).
This is the pilots' primary airspeed reference. A primary flight display with the indicated airspeed displayed in the form of a vertical tape on the left.
It is the most straightforward measurement of aircraft speed seen by the pilot; however, it may not accurately reflect the true speed of the aircraft due to these unaccounted factors.
To get accurate airspeed for navigation and performance purposes, corrections are applied to IAS to obtain calibrated airspeed (CAS), true airspeed (TAS), or equivalent airspeed (EAS), as appropriate depending on the flight conditions.