noun
: an instrument that records the distance traveled by an aircraft relative to the air through which it moves, the average true airspeed being computable from the distance traveled and the time elapsed
noun
: an instrument that records the distance traveled by an aircraft relative to the air through which it moves, the average true airspeed being computable from the distance traveled and the time elapsed
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012