One of the mysteries of the English language finally explained.
The chemical element of atomic number 36, a member of the noble gas series. It is obtained by distillation of liquid air, and is used in some kinds of electric light.
- ‘They attributed those lines to the presence of three new elements, which they named neon, krypton, and xenon.’
- ‘Sometimes a mixture of krypton and argon are used instead of the mercury.’
- ‘Other gasses - such as argon and krypton - can be used in the space between the glass panes instead of air.’
- ‘However, some windows use argon or krypton in this space to improve thermal performance.’
- ‘Consider windows that fill that space with gases like argon, krypton, or a mix of the two.’
Late 19th century: from Greek krupton, neuter of kruptos ‘hidden’.
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