ANCON (from the Gr. ayi ww)  , the anatomical name for " elbow "; " ancones " in architecture are the projecting bosses left on stone blocks or on drums of columns, to allow of their being either hoisted aloft or rubbed backwards and forwards to obtain a fine joint; the term is also given by Vitruvius to the trusses or console brackets on each side of the doorway of a Greek or Roman building which support the cornice over the same . A particular sort of sheep, with short crooked forelegs, is called " ancon " sheep .