krypton

[krip-ton]
noun Chemistry.
an inert, monatomic gaseous element, present in very small amounts in the atmosphere: used in high-power, tungsten-filament light bulbs. Symbol: Kr; atomic weight: 83.80; atomic number: 36.

Origin:
1895–1900; < Greek kryptón, neuter of kryptós hidden, secret; see crypt

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World English Dictionary
krypton (ˈkrɪptɒn)
 
n
an inert gaseous element occurring in trace amounts in air and used in fluorescent lights and lasers. Symbol: Kr; atomic no: 36; atomic wt: 83.80; valency: 0; density: 3.733 kg/m³; melting pt: --157.37°C; boiling pt: --153.23±0.10°C
 
[C19: from Greek, from kruptos hidden; see crypt]

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Word Origin & History

krypton
"inert gaseous element," 1898, coined by its discoverers (Sir William Ramsay and Morris W. Travers) from Gk. krypton, neut. of kryptos "hidden;" so called because it was a rare gas.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

krypton kryp·ton (krĭp'tŏn')
n.
Symbol Kr
A largely inert gaseous element used in gas fluorescent lamps. Atomic number 36; atomic weight 83.80; melting point -157.4°C; boiling point -153.22°C; density 3.73 grams per liter (0°C).

The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
krypton   (krĭp'tŏn')  Pronunciation Key 
Symbol Kr
A colorless, odorless element in the noble gas group. It is used in certain fluorescent lamps and photographic flash lamps. Atomic number 36; atomic weight 83.80; melting point -156.6°C; boiling point -152.30°C; density 3.73 grams per liter (0°C). See Periodic Table.
The American Heritage® Science Dictionary
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FOLDOC
Computing Dictionary

KRYPTON definition


A frame language.
["An Essential Hybrid Reasoning System: Knowledge and Symbol Level Accounts of KRYPTON", R.J. Brachman et al, Proc IJCAI-85, 1985].

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Krypton isn't the only element to show up in the pages of comic books.
All of it was believed to be in the form of two relatively innocuous gases, xenon and krypton.
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