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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English tertiān, terciān, terciāne (adjective and noun), originally often as part of the collocation fever cum terciane, after Latin febris cum tertiānā. Compare the "third" essence of tertiary. By surface analysis, terti- + -an.
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tap / space
Classic usage
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