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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
From the Latin word sulfurōsus, dating back to 1520-30. See sulfur, -ous
Related forms
sulfurously, adverb
sulfurousness, noun
nonsulfurous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Word Origin and History for sulfurous

also sulphurous, 1530s, from Latin sulphurosus or a native formation from sulfur + -ous. Related: Sulfurously; sulphurously.


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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