(aviation) The airspeed displayed by an aircraft's airspeed indicator based on measurements from the pitot-static system; the airspeed used by pilots and air traffic control when flying and controlling aircraft.

Any device for comparing a physical property of two objects, or an object with a standard.

A float used by anglers to tell when a fish has taken the bait

plural of indicative mood

plural of heat index

plural of price index

plural of leading indicator

A phenomenon that generally occurs in advance of a more important phenomenon, aiding in its prediction.

(algebra, of a group) Such that each of its nontrivial, finitely generated subgroups maps homomorphically onto ℤ.

plural of pH indicator