Krypton Definition
 krĭptŏn 
    noun
  
 A rare, gaseous chemical element, one of the noble gases, present in very small quantities in air: basically inert, it reacts with fluorine and some other elements under special conditions: symbol, Kr; at. no. 36
 Webster's New World 
Synonyms: 
  
- atomic number 36
- kr
Origin of Krypton
- Greek krupton neuter of kruptos hidden (from its rarity) from kruptein to hide - From American Heritage Dictionary of the English Language, 5th Edition 
- Neuter form of Ancient Greek κρυπτός (kruptos, “hidden”). - From Wiktionary 
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