• WordNet 3.6
    • n krypton a colorless element that is one of the six inert gasses; occurs in trace amounts in air
    • ***
Webster's Revised Unabridged Dictionary
    • n Krypton krĭp"tŏn (Chem) An inert gaseous element of the argon (noble gas) group, of atomic number 36, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Boiling point, -152.3° C.; melting point, -156.6° C.; symbol, Kr; atomic weight, 83.8.
    • ***
Century Dictionary and Cyclopedia
    • n krypton A chemical element, one of the five recently discovered gaseous constituents of the atmosphere, first obtained by Ramsay and Travers in 1898. It is colorless, transparent, without observable taste or smell, of density 40.88 as compared with hydrogen, liquefiable at—151.7° C. under atmospheric pressure, and occurs in the atmosphere to the extent of but 1 volume in 20,000,000 volumes of air.
    • ***


Webster's Revised Unabridged Dictionary
NL., fr. Gr. krypto`n, neut. of krypto`s hidden


In literature:

Discovery of Krypton by Ramsey and Travers.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn

In news:

The MAC 575 Krypton ™ is the newest in Martin's line of award-winning MAC moving heads and the latest in the Krypton series.
Based on the MAC 700 platform, the MAC 575 Krypton combines efficient optics for brighter output with outstanding gobos and colors, all wrapped in the MAC's modular design.
"I got to thinking about the distance between Earth and Krypton , and the fact that light from Krypton would still be reaching Earth long after the planet itself was gone, and that led to the story.".
SUPERMAN'S KRYPTON : Neil deGrasse Tyson 'locates' Kal-El's home planet in the known universe.
But in case you're some sort of commie, the idea is that he was born on the planet Krypton orbiting a far away red star.
Superman's planet Krypton 'found' — with a little help.
Krypton Factor Zips to Golden Shaheen Win.
Krypton Factor flies home in the Dubai Golden Shaheen.
Hitchens Edges Krypton Factor in Al Shindagha.
Hitchens (left) overtakes Krypton Factor to win the Al Shindagha Sprint.
Marvin Windows and Doors' Tripane with Krypton .
Krypton Upsets Nordic Truce in Hill Prince.
Krypton outfights Nordic Truce to capture the Hill Prince.
Marvin Fong, The Plain Dealer Case Western Reserve University physicists Tom Shutt, left, and Dan Akerib stand next to a piece of equipment called a krypton removal panel.
SUPERMAN'S KRYPTON: Neil deGrasse Tyson 'locates' Kal -El's home planet in the known universe.

In science:

The fraction of krypton in helium was maintained below 0.3% to avoid self-absorption of krypton lines.
Accurate transition rates for the 5p - 5s transitions in Kr I
To check for optical thickness, the krypton spectra were measured with varying amounts of krypton in the discharge.
Accurate transition rates for the 5p - 5s transitions in Kr I
The krypton spectra were recorded with a CCD camera that was mounted at the exit plane of the monochromator.
Accurate transition rates for the 5p - 5s transitions in Kr I
The NIST 2m – Fourier transform spectrometer (described in Nave et al. ) was used to measure the spectra of the hollow cathode lamp and the standard lamp. A resolution of around 0.01 cm−1 was used for the measurements of the krypton spectra.
Accurate transition rates for the 5p - 5s transitions in Kr I
Some residual self-absorption was evident for the strongest lines even at low krypton partial pressures.
Accurate transition rates for the 5p - 5s transitions in Kr I