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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from New Latin thyreoīdēs, from Ancient Greek θῠρεοειδής (thŭreoeidḗs, “shield-shaped”), from θῠρεός (thŭreós, “an oblong shield”) + -ειδής (-eidḗs, “-form, -like”).
thyroid gland
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Classic usage
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