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Of, relating to, or being an airplane with wings constructed to allow the outer portion to fold back along the fuselage to produce streamlining at high speeds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Aeronautics) of or relating to a variable-geometry aircraft
a. such an aircraft
b. either wing of such an aircraft
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