Aviation Dictionary

On this page you will find a searchable and comprehensive alphabetical list of aviation terms. You can help us make it the most comprehensive list in the world. If we have missed anything, click on the ‘send us your word’ button to send us your word, acronym or definition and we will consider adding it to our dictionary.

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Retractable undercarriage

Landing gear is the undercarriage of an aircraft and may be used for either takeoff or landing. Some aircraft have retractable undercarriages, which fold away during flight to reduce drag.

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