sulphuric

World English Dictionary
sulphur or sulfur (ˈsʌlfə)
 
n
a.  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°CRelated: thionic
 b.  (as modifier): sulphur springs
 
Related: thionic
 
[C14 soufre, from Old French, from Latin sulfur]
 
sulfur or sulfur
 
n
 
Related: thionic
 
[C14 soufre, from Old French, from Latin sulfur]
 
sulphuric or sulfur
 
adj
 
sulfuric or sulfur
 
adj

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