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The Collaborative International Dictionary
Nacreous

Nacreous \Na"cre*ous\ (n[=a]"kr[-e]*[u^]s), a. [See Nacre.] (Zo["o]l.) Consisting of, or resembling, nacre; pearly.

Douglas Harper's Etymology Dictionary
nacreous

"resembling nacre," 1807, from nacre + -ous.

Wiktionary
nacreous

a. Of, or resembling nacre (mother of pearl).

WordNet
nacreous
  1. adj. consisting of or resembling mother-of-pearl

  2. having a play of lustrous rainbow-like colors; "an iridescent oil slick"; "nacreous (or pearlescent) clouds looking like mother-of-pearl"; "a milky opalescent (or opaline) luster" [syn: iridescent, opalescent, opaline, pearlescent]

Usage examples of "nacreous".

It looked as if it was just below us, rising out of a flat sea of nacreous mist or lowish cloud that reflected the moonlight.

Rare carpets covered mosaicked floors, and bore furnishings inlaid with nacreous mother-of-pearl and deep blue lapis-lazuli.

Strings of nacreous spheres curl in strange loops around a hidden core, expanding and turning inside out in systolic pulses that spawn waves of recomplication through the structure.

The undersides held a stickier yellow glow, and here and there a gleaming edge was picked out in nacreous brown, and the occasional filigree lacework that blossomed around a ruptured skin.

In appearance it was not unlike a great chambered nautilus, pink, nacreous, and just translucent enough that any listener would be instantly detected and swallowed by the ferocious bytes that cruised these sacred streams.

Stephen slept the longer of the two, but when at last he came on deck he found that he was in time for an evening so perfect that it made all foul weather seem worth while: with a flowing sheet and under an easy sail the Surprise was slipping through the sea: and such a sea, smooth, dreamlike, limitless, with an infinity of subtle nacreous colours merging into one another and a vast pure sky overhead.

Scores of tourists walked about, buying trinkets - carved rock, elaborately patterned fabrics, nacreous jewels that were secreted in the bellies of the Kmaush, perfumes pressed from seaweed, statuettes, tiny aquaria in sealed globes, with a microscopic lens through which could be seen weirdly beautiful seascapes peopled with infusoria, tiny sponges, corals, darting squids, infinitesimal fish.

One adorned with lacelike traceries, black against the nacreous glow shining through the plastic membrane.