Word Study
    voussoir
WORDNET DICTIONARY
Noun voussoir has 1 sense
CIDE DICTIONARY
voussoir, n. [F., akin to voûte an arch, a vault.]. 
                                            
                                         One of the wedgelike stones of which an arch is composed.                                                                                 [1913 Webster]                                                                                                                    
                                                                                    OXFORD DICTIONARY
voussoir, n.  each of the wedge-shaped or tapered stones forming an arch.
                    Etymology
                        OF vossoir etc. f. pop.L volsorium ult. f. L volvere roll
                                    
            For further exploring for "voussoir" in Webster Dictionary Online
        

