The wingspan (or just span) of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about ; and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of , the official record for a living bird.
The term wingspan, more technically extent, is also used for other winged animals such as pterosaurs, bats, insects, etc., and other fixed-wing aircraft such as ornithopters.
==Wingspan of aircraft==
The wingspan of an aircraft is always measured in a straight line, from wingtip to wingtip, independently of wing shape or sweep.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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