Aviation

Aviation

Dealing with vehicles or machines used in flight or propulsion through the air.

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Aviation > Aeronautics

air defense emergency

Aviation; Aeronautics

A military emergency condition declared by a designated authority. This condition exists when an attack upon the continental U.S., Alaska, Canada, or U.S. installations in ...

quartz

Aviation; Aeronautics

A mineral (silicon dioxide) found in nature as a hexagonal (six-sided) crystal. Quartz has piezoelectric characteristics, as it produces a voltage when it is bent or pressed, and ...

AD oil

Aviation; Aeronautics

A mineral-base lubricating oil used in reciprocating engines. This oil does not contain any metallic ash-forming additives, but has additives that disperse the contaminants so ...

front-surface mirror

Aviation; Aeronautics

A mirror with the reflective material on its front surface, rather than on the back.

air-to-surface missile (ASM)

Aviation; Aeronautics

A missile carried on an aircraft and used against a surface target. The missile is guided to its target by an internal guidance system or by signals from the launch aircraft.