rocket science

noun

Definition of rocket science

: the science of designing or building rockets also : something that is very difficult to learn or understand The job is challenging, but it's not exactly rocket science.

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“Rocket science.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/rocket%20science. Accessed 19 January 2020.

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