rocket-science

rocket science

noun
2.
something requiring great intelligence, especially mathematical ability.
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World English Dictionary
rocket science
 
n
informal an activity requiring considerable intelligence and ability (esp in the phrase not exactly rocket science)
 
rocket scientist
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Rocket-science is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a scrap or morsel of food left at a meal.
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