ADI

Attitude director indicator

In the context of aviation and aerospace, an "Attitude Director Indicator" (ADI) is a type of flight instrument that provides the pilot with information on the aircraft's orientation and attitude relative to the ground and the horizon.

Automatic De-Ice and Inhibitor

In the context of aviation and aerospace, "Automatic De-Ice and Inhibitor" refers to a system or a type of fluid used to prevent the formation of ice on an aircraft's surfaces, particularly on the wings, control surfaces, and other critical areas.