Longman Dictionary of Contemporary English
Douglas Harper's Etymology Dictionary
also roundtable, 1826 in reference to a gathering of persons in which all are accorded equal status (there being no head of a round table.) King Arthur's Round Table is attested from c.1300, translating Old French table ronde (1155, in Wace's Roman de Brut).
Usage examples of "round-table".
Because of the time it would inevitably take to organise, a congress that some had called for was never convened, but in compensation there were colloquia, seminars, round-table discussions, some open to the public, others held behind closed doors.
They were starting off the broadcast with a round-table discussion among the four metapundits whom Ogle had hand-picked from Central Casting.
And who knows but that if we Knights of the Rose hold together we may go forth into the world, and do battle with them, and save beautiful ladies, and have tales and gestes written about us as they are writ about the Seven Champions and Arthur his Round-table.
Though the 'Six O'Clock Soviet', as the daily round-table conference was called, seldom lasted more than ten minutes, it played a vital role in maintaining morale.
He had spent fifteen years learning his craft, watching a generation of commanders as a junior officer, listening carefully at the frequent round-table discussions which made submarining a very human profession, its lessons passed on by verbal tradition.