Doctor, as a teetle, oreeginates frae the Laitin wird o the same spellin an meanin. The wird is oreeginally an agentive noun o the Laitin verb docēre[dɔˈkeːrɛ] 'tae teach'. It haes been uised as an honoured academic teetle for ower a millennium in Europe, whaur it dates back tae the rise o the first varsities, the earliest o which was the Varsity o Paris. This uise spread tae the Americas, throu its umwhile European colonies, an is nou prevalent in maist o the warld. Contractit "Dr" or "Dr.", it is uised as a designation for a person wha haes obtained a Research Doctorate (i.e. Ph.D., D.P.H., etc.), or clinical doctorate (M.D., D.D.S., etc.).