1 adj Scientific is used to describe things that relate to science or to a particular science.
usu ADJ n
Scientific research is widely claimed to be the source of the high standard of living in the US., ...the use of animals in scientific experiments.
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scientifically adv
...scientifically advanced countries.
2 adj If you do something in a scientific way, you do it carefully and thoroughly, using experiments or tests.
usu ADJ n
(=systematic)
It's not a scientific way to test their opinions.
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scientifically adv
Efforts are being made to research it scientifically.