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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from French noctule, a latinised scientific borrowing of the Italian nottola (refers to various birds or bats), inherited from Late Latin noctula, diminutive of Classical Latin noctua (“night-owl”), ultimately from Latin nox (“night”), from Proto-Indo-European *nókʷts. Per the OED, first attested in English in 1771.
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Classic usage
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