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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From New Latin theodolitus (1571), perhaps containing Ancient Greek θέᾱ (théā, “sight, view”) and Arabic العِضَادَة (al-ʕiḍāda, “astrolabe, alidade”); if so, doublet of alidade.
transit
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tap / space
Classic usage
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