English Lexicon

Nacreous

/ˈneɪ.kri.əs/
adjectiveCEFR C2 (Proficient)Top #28500 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Showing a iridescent, pearly luster; resembling or containing nacre.

    "The inside of the oyster shell exhibited a beautiful nacreous sheen."
  2. 2

    Relating to rare, high-altitude polar stratospheric clouds that display brilliant pastel colors.

    "Stargazers were treated to a rare display of nacreous clouds glowing in the winter twilight."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the French word 'nacre' (mother-of-pearl), which traces back via Arabic 'naqqāra' or Persian roots to describe iridescent shell layers. The English suffix '-ous' was added in the mid-19th century to form an adjective describing surfaces or clouds resembling pearl in luster.

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