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phugoid

adjective
phu·​goid | \ ˈfyüˌgȯid\

Definition of phugoid

: of, relating to, or representing variations in the longitudinal motion or course of the center of mass of an airplane in flight

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History and Etymology for phugoid

irregular from Greek phygē act of fleeing, avoidance, flight + English -oid; akin to Greek pheugein to run away, flee

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