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单词 extrados
释义

WordReference Random House Unabridged Dictionary of American English © 2024
ex•tra•dos  (ekstrə dos′, -dōs′, ek strādos, -dōs),USA pronunciation n., pl. -dos (-dōz′, -dōz),USA pronunciation -dos•es. [Archit.]
  1. Architecturethe exterior curve or surface of an arch or vault. Also called back. Cf. intrados. See diag. under arch. 
  • Latin dorsum dorsum
  • French, equivalent. to extra- extra- + dos back (
  • 1765–75

Collins Concise English Dictionary © HarperCollins Publishers::
extrados /ɛkˈstreɪdɒs/ n ( pl -dos / -dəʊz/, -doses)
  1. the outer curve or surface of an arch or vault
Etymology: 18th Century: from French, from extra- + dos back, from Latin dorsum
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