Kr

noun

1. a colorless element that is one of the six inert gasses; occurs in trace amounts in air

   noun.substance

   Synonyms atomic number 36 krypton

   Source: WordNet 3.0

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

   noun.group

   Synonyms communist party of kampuchea khmer rouge party of democratic kampuchea

   Source: WordNet 3.0