HyperDic English EXTRAD ... extrados

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English 1 sense of the word *extrados*:
NOUN	shape	extrados	the exterior curve of an arch

Englishextrados: 1 sense noun 1, shape
Meaning	The exterior curve of an arch.
Broader	curve, curved shape	The trace of a point whose direction of motion changes
Spanish	extradós, trasdós
Catalan	extradós

HyperDicEnglishEXTRAD ... extrados