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krypton

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kryp⋅ton

  [krip-ton]
Use krypton in a Sentence
–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; < Gk kryptón, neut. of kryptós hidden, secret; see crypt
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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kryp·ton   (krĭp'tŏn')   
n.   Symbol Kr
A whitish, largely inert gaseous element used chiefly in gas discharge lamps and fluorescent 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 Table at element.

[Greek krupton, neuter of kruptos, hidden (from its rarity), from kruptein, to hide.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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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, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: kryp·ton
Pronunciation: 'krip-"tän
Function: noun
: a colorless relatively inert gaseous element found in air at about one part permillion —symbol Kr; —see ELEMENT table
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Computing Dictionary

KRYPTON
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, © 1993-2007 Denis Howe
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