Krypton

//ˈkɹɪptɒn// name, noun

Definitions

Proper Noun
  1. 1
    A fictional planet, the native world of Superman, named after the element krypton.
Noun
  1. 1
    The chemical element (symbol Kr) with an atomic number of 36. It is a colourless, odourless noble gas that only reacts with fluorine. It is one of the rarest gases in the Earth's atmosphere. uncountable
  2. 2
    a colorless element that is one of the six inert gasses; occurs in trace amounts in air wordnet
  3. 3
    An atom of this element. countable

Etymology

From Ancient Greek κρυπτός (kruptós, “hidden”) + -on, used for all noble gases.

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