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flame-out failure of the combustion of a jet engine while the aircraft is in flight.
flamethrower a military weapon that shoots a stream of ignited incendiary fuel such as gas or napalm.
flame tree any of several trees bearing vivid red flowers, esp. a bottletree with leaves resembling those of the maple.
flaming full of flames; blazing. [4 definitions]
flamingo any of various large, tropical wading birds with very long legs and necks and bright pink or red feathers.
flammable able to catch on fire easily; combustible.
flan a Spanish custard dessert topped with burnt-sugar syrup.
Flanders a North Sea region that includes parts of Belgium, France, and the Netherlands.
flange a collar or rim that projects from a pipe, housing, or the like to provide strength, stability, or a place for attaching other parts. [2 definitions]
flank the part of a human or animal between the hip and the ribs on either side of the body. [5 definitions]
flanker someone or something that flanks. [2 definitions]
flannel a soft, heavy fabric made of wool, cotton, synthetics, or a blend of these, used esp. for warm clothing or bed covering. [2 definitions]
flannelette a soft cotton fabric used esp. for underwear and clothes for babies.
flap to move the arms, wings, or the like rapidly up and down. [7 definitions]
flap-doodle (informal) foolishness; nonsense.
flapjack a flat cake made by frying batter in a small amount of butter or other fat; pancake; griddlecake.
flapper something that flaps. [3 definitions]
flare to blaze or burn brightly, esp. suddenly (often fol. by up). [8 definitions]
flare-up a sudden eruption of light or fire. [3 definitions]
flare up to suddenly burst forth in anger.
flaring of a flame, increasing suddenly and briefly in intensity. [2 definitions]