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fey having an unusual, otherworldly charm or appeal; elfin. [3 definitions]
fey Scot a Scotsman who is doomed or fated to die; used in reference to the character of Macbeth in Shakespeare's play.
fez a man's felt cap, shaped like a flat-topped cone and usu. red with a black tassel, worn esp. in Middle Eastern countries.
ff. abbreviation of "and the following."
FHA abbreviation of "Federal Housing Administration."
fiancé a man who is engaged to be married.
fiancée a woman who is engaged to be married.
fiasco an utter and shameful failure.
fiat an authoritative, often arbitrary, decree or order.
fiat currency paper currency that is dependent for its value on a government fiat or decree, and cannot be exchanged for gold or silver.
fiat money paper currency that is dependent for its value on a government fiat or decree, and cannot be exchanged for gold or silver.
fib a trivial or unimportant lie. [2 definitions]
fiber a minute threadlike structure of cotton, wool, asbestos, or the like. [5 definitions]
fiberboard a building material made by bonding and compressing fibers, usu. of wood, into rigid sheets.
fiberglass fine filaments of glass made into a fibrous insulating material or molded into a solid material for use as boat hulls, other vehicle bodies, and the like.
fiber optics a method of transmitting light through fine transparent flexible strands, usu. of glass or plastic.
fibre a spelling of fiber used in Canada and Britain. See fiber.
fibreglass a spelling of fiberglass used in Canada and Britain. See fiberglass.
fibril an extremely small fiber or hairlike structure, as on plant roots.
fibrillation involuntary and uncoordinated rapid twitching of muscle fibrils, esp. in the heart muscles. [2 definitions]
fibrin a tough, white, elastic protein formed in the clotting of blood.