n a colorless element that is one of the six inert gasses; occurs in trace amounts in air
n a communist organization formed in Cambodia in 1970; became a terrorist organization in 1975 when it captured Phnom Penh and created a government that killed an estimated three million people; was defeated by Vietnamese troops but remained active until 1999
n United States artist remembered for her spontaneous approach to painting; she was a founder of the New York school of abstract expressionism (1908-1984)