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 route passed through some of the most difficult terrain of western China by traveling west, then north, to Shaanxi. The Long March began Mao Zedong's ascent to power, whose leadership during the retreat gained him the support of the members of the party.