Realgar meaning

rē-ăl'gär', -gər
A soft orange-red arsenic ore, As2 S2 , used in pyrotechnics and tanning and as a pigment.
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A bright orange-red, monoclinic mineral, AsS, used in fireworks, paints, etc.; arsenic sulfide.
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(mineralogy) A mineral, arsenic sulfide (AsS), often associated with orpiment and stibnite in lead, silver and gold ores.
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Origin of realgar

  • Middle English from Medieval Latin from Catalan from Arabic rahj al-ġār powder (of) the mine or cave rahj powder al- the ġār cave ġrr in Semitic roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • Old English, from Medieval Latin, from Arabic رهج الغار (rahj-al-ğār, “cave dust”).
    From Wiktionary

Realgar Sentence Examples

  • Arsenic, in its well-known and beautiful forms, orpiment and realgar, is found in New South Wales and Victoria.

  • Many substances were employed in ancient medicine: galena was the basis of a valuable Egyptian cosmetic and drug; the arsenic sulphides, realgar and orpiment, litharge, alum, saltpetre, iron rust were also used.

  • Cinnabar, realgar, orpiment and coal form the rest of the mineral products of Kwei-chow.

  • ORPIMENT (auripigmentum), arsenic trisulphide, As2S3, or yellow realgar, occurring in small quantities as a mineral crystallizing in the rhombic system and of a brilliant goldenyellow colour in Bohemia, Peru, &c. For industrial purposes an artificial orpiment is manufactured by subliming one part of sulphur with two of arsenic trioxide.

  • Arsenic is a constituent of the minerals arsenical iron, arsenical pyrites or mispickel, tin-white cobalt or smaltite, arsenical nickel, realgar, orpiment, pharmacolite and cobalt bloom, whilst it is also met with in small quantities in nearly all specimens of iron pyrites.

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Words near realgar in the Dictionary