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extortion
extortionate
extra
extra-
extra-base hit
extra cover
extra end
extra point
extra time
extra-virgin olive oil
extracanonical
extracellular
extrachromosomal
extracorporeal
extracranial
extract
extraction
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extrados
ex·tra·dos [ ékstrə dòss, ékstrə dss ] (plural ex·tra·dos [ ékstrə dz ] or ex·tra·dos·es)


noun 
Definition:
 
outside of an arch: the outer curve of an arch
[Late 18th century. < French< Latin extra "outside" + French dos "back"]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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