Origin: Latin suffix -able
Round table has 4 different meanings across 2 categories:
a meeting of peers for discussion and exchange of views
"a roundtable on the future of computing"
(legend) the circular table for King Arthur and his knights
A conference at which participants of similar status discuss and exchange views.
King Arthur's table in the Arthurian legend, around which he and his knights congregate, all having equal status since the table has no head.