In a manner that follows the principles and methods of science; systematically and objectively.
From 'scientific' plus '-ally' suffix. 'Scientific' derives from Latin 'scientia' meaning 'knowledge' from 'scire' (to know). The systematic methodology sense developed during the Scientific Revolution of the 16th-17th centuries.
The adverb 'scientifically' didn't just describe a method—it became a badge of authority and credibility. When someone says 'scientifically proven,' they're invoking centuries of methodological development that transformed human understanding from speculation to systematic investigation.
Complete word intelligence in one call. Free tier — 50 lookups/day.