Sanger n 1: English biochemist who determined the sequence of amino acids in insulin and who invented a technique to determine the genetic sequence of an organism (born in 1918) [syn: {Frederick Sanger}, {Fred Sanger}] 2: United States nurse who campaigned for birth control and planned parenthood; she challenged Gregory Pincus to develop a birth control pill (1883-1966) [syn: {Margaret Sanger}, {Margaret Higgins Sanger}]