tap / space
Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Calque of German Ökologie (coined in 1866 by Ernst Haeckel), from Ancient Greek οἶκος (oîkos, “house”) + -λογία (-logía, “study of”). By surface analysis, eco- + -logy.
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tap / space
Classic usage
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