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Rocket scientist

//ˌɹɒkɪt ˈsaɪəntɪst// noun, slang

Noun

1
An aerospace engineer. informal
"Rocket scientists have calculated that a velocity of seven miles per second, or approximately 25,000 miles per hour, would be necessary for a rocket to escape the earth's gravity."
2
an engineer who builds and tests rockets wordnet
3
One qualified to handle or understand things which are very complex or confusing; a very intelligent person. excessive, idiomatic, informal
"You don’t have to be a rocket scientist to see that that idea won’t work."
4
a clever thinker wordnet

From rocket + scientist.

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