femtosecond

femtosecond

noun
one quadrillionth (10^-15) of a second; one thousandth of a picosecond 
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Femtosecond is always a great word to know.
So is ninnyhammer. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a fool or simpleton; ninny.
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