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Where does the word "theory" come from? It comes from Greek theōria, passing through Late Latin before entering English (1590s).
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Where does the word "theory" come from? It comes from Greek theōria, passing through Late Latin before entering English (1590s).
Theory’s story begins in Greek: theōria meant “contemplation, viewing.” From 'theōros', spectator; related to 'theatre'. By ancient, the word had taken hold in Late Latin as theoria. Used for speculative thought. It reached English by 1590s as theory. In science, a well-tested explanation, not a guess. Today, theory means a system of ideas explaining something.
- Stage 1 · Greek · ancient theōria "contemplation, viewing", from 'theōros', spectator; related to 'theatre'.
- Stage 2 · Late Latin · ancient theoria "speculation", used for speculative thought.
- Stage 3 · English · 1590s theory "an explanatory idea", in science, a well-tested explanation, not a guess.