tap / space
Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From French ptérodactyle, a term coined by Cuvier from Ancient Greek πτερόν (pterón, “wing”) + δάκτυλος (dáktulos, “finger”). By surface analysis, ptero- + -dactyl.
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Classic usage
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