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  1.                 From WordNet dictionary, version 3.0:
                

    
                
                  
    kr
n. 1. a colorless element that is one of the six inert gasses; occurs in trace amounts in air
Synonyms: krypton, Kr, atomic number 36
2. 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
Synonyms: Khmer Rouge, KR, Party of Democratic Kampuchea, Communist Party of Kampuchea

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