Williams syndrome: A genetic disorder characterized by mild mental retardation, unique personality characteristics, unusual facial features, and cardiovascular disease. The level of calcium tends to be high in blood (hypercalcemia) and urine (hypercalciuria).
Long March: Long March, (1934â35), the 6,000-mile (10,000-km) historic trek of the Chinese communists, which resulted in the relocation of the communist revolutionary base from southeastern to northwestern China and in the emergence of Mao Zedong as the undisputed party leader. Fighting Nationalist forces
The March on Washington was the largest political rally in human  history. The march was attended by some 200,000-300,000 people who  were all supporters of the civil rights â¦ movement.Among them was  Martin Luther King Jr who gave his I have a dream speech at the  march.he March on Washington was the largest political rally in human  history. The march was attended by some 200,000-300,000 people who  were all supporters of the civil rights â¦ movement.