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[suhl-fer] /ˈsʌl fər/
Chiefly British. sulfur (def 1).
Also, sulfur. yellow with a greenish tinge; lemon color.
Origin of sulphur
variant of sulfur


[suhl-fer] /ˈsʌl fər/
a city in SW Louisiana. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for sulphur


  1. an allotropic nonmetallic element, occurring free in volcanic regions and in combined state in gypsum, pyrite, and galena. The stable yellow rhombic form converts on heating to monoclinic needles. It is used in the production of sulphuric acid, in the vulcanization of rubber, and in fungicides. Symbol: S; atomic no: 16; atomic wt: 32.066; valency: 2, 4, or 6; relative density: 2.07 (rhombic), 1.957 (monoclinic); melting pt: 115.22°C (rhombic), 119.0°C (monoclinic); boiling pt: 444.674°C related adjective thionic
  2. (as modifier): sulphur springs
Derived Forms
sulphuric, (US) sulfuric (sʌlˈfjʊərɪk) adjective
Word Origin
C14 soufre, from Old French, from Latin sulfur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sulphur

see sulfur. The form prefered in Britain; the spelling's suggestion of a Greek origin is misleading.

Online Etymology Dictionary, © 2010 Douglas Harper
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sulphur in Science
sulfur also sulphur
Symbol S
A pale-yellow, brittle nonmetallic element that occurs widely in nature, especially in volcanic deposits, minerals, natural gas, and petroleum. It is used to make gunpowder and fertilizer, to vulcanize rubber, and to produce sulfuric acid. Atomic number 16; atomic weight 32.066; melting point (rhombic) 112.8°C; (monoclinic) 119.0°C; boiling point 444.6°C; specific gravity (rhombic) 2.07; (monoclinic) 1.957; valence 2, 4, 6. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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