Any member of the Tubulariidae family of hydrozoans.

A village in the city of Newcastle upon Tyne, Tyne and Wear, England (OS grid ref NZ1566).

A system of philosophy, chiefly ethics, based upon the teachings of Epicurus (c. 340–c. 270 BC), that advocated retreat from public life to preserve one's long-term happiness and ataraxia.

Alternative form of MRDD