scientific
adj.adj. relating to science or the careful way scientists study things. You use it to describe methods that are organized, based on facts, and tested to see if they are true.
adj. relating to, based on, or used in science; following a systematic and logical approach to discovering how things work. Often used to distinguish empirical evidence from anecdotal or subjective claims.
The researchers used a scientific method to test the new medicine.
The team conducted a scientific study to determine how much sleep students actually need to perform well.
While the theory seemed plausible in a casual setting, it lacked the rigorous scientific backing required for publication in a peer-reviewed journal.
Typically placed before the noun it modifies; can be used in a gradable sense to mean 'systematic' or 'precise'.