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[suhl-fyoo r-uh s, suhl-fer-] /sʌlˈfyʊər əs, ˈsʌl fər-/
of, relating to, or containing sulfur, especially in the tetravalent state.
of the yellow color of sulfur.
sulphurous (defs 2, 3).
Origin of sulfurous
1520-30; < Latin sulfurōsus. See sulfur, -ous
Related forms
sulfurously, adverb
sulfurousness, noun
nonsulfurous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Origin and History for sulfurous

also sulfurous, 1520s, "of the nature of brimstone," from sulfur + -ous. Hence figurative use with suggestions of hellfire (c.1600). Scientific chemistry sense is from 1790. Earlier in the "brimstone-like" sense was sulphurious (late 15c.).

Online Etymology Dictionary, © 2010 Douglas Harper
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sulfurous in Medicine

sulfurous sul·fur·ous (sŭl'fər-əs, -fyər-, sŭl-fyur'əs)

  1. Of, relating to, derived from, or containing sulfur, especially with valence 4.

  2. Characteristic of or emanating from burning sulfur.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sulfurous in Science
  (sŭl'fər-əs, sŭl-fyr'əs)   
  1. Containing sulfur, especially sulfur with a valence of 4 or 3. Compare sulfuric.

  2. Characteristic of or emanating from burning sulfur.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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