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fianchetto
Fianna
Fianna Fáil
fiasco
fiat
fiat money
fib
fiber
fiber artist
fiber bundle
fiber optics
fiberboard
fiberfill
Fiberglas
fiberglass
fiberscope
Fibonacci number
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fibrillation

fib·ril·la·tion [ fìbbrə láysh'n ] (plural fib·ril·la·tions)


noun 
Definition:
 
1. rapid irregular heartbeat: rapid chaotic beating of the heart muscles in which the affected part of the heart may stop pumping blood

2. rapid contraction of muscle fibers: rapid uncontrolled contraction of individual muscle fibers with little or no movement of the muscle as a whole

3. formation of fibers: the formation of fibers or fibrils

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