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1. A mineral of hydrated silica.
2. A gemstone made of this mineral, noted for its rich iridescence.

[Early Modern English, from Middle French opale, from Latin opalus, alteration of Greek opallios, probably from Sanskrit upalaḥ, stone, precious stone (often in the sandhi form opalaḥ in the names of gems such as nīlopalaḥ, sapphire : nīla-, blue + upalaḥ), possibly variant of upara-, lower, from upa, towards, under, down; see upo in the Appendix of Indo-European roots.]

o′pal·ine′ (ō′pə-līn′, -lēn′) adj.


an opaque or semiopaque whitish glass


(ˈoʊ pə lɪn, -ˌlin, -ˌlaɪn)

like opal; opalescent.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.opaline - having a play of lustrous rainbow colors; "an iridescent oil slick"; "nacreous (or pearlescent) clouds looking like mother-of-pearl"; "a milky opalescent (or opaline) luster"
bright - emitting or reflecting light readily or in large amounts; "the sun was bright and hot"; "a bright sunlit room"


adjopalen (liter)


[ˈəʊpəˌlaɪn] nopalina
References in classic literature ?
The great cloud-barred disk of the sun stood just above a limitless expanse of tossing white-caps--so to speak--a billowy chaos of massy mountain domes and peaks draped in imperishable snow, and flooded with an opaline glory of changing and dissolving splendors, while through rifts in a black cloud-bank above the sun, radiating lances of diamond dust shot to the zenith.
Its nature is like opaline doves'-neck lustres, hovering and evanescent.
This glitter, this opaline lustre plays round the top of every toy to his eye to insure his fidelity, and he is deceived to his good.
In reacting to the heavy, clear crystal cut glass of the mid 19th Century, he chose opaline glass, emphasising the differences in every way.
Cast includes Jenine Desiderio, May Bayot, Myke Salomon, Red Nuestro, Delphine Buencamino, Trixie Esteban, Cheeno Macaraig, Tara Cabaero, Hazel Maranan, Opaline Santos, Kristofer Kliatchko, Cyril Balderama and Philip Palmos, with the TP Actors' Company as ensemble, featuring Jonathan Tadioan, Marco Viana, Remus Villanueva, Nicolo Magno, Ralph Mateo, Regina de Vera, Jovanni Cadag and Doray Dayao.
Representing the brand's first foray into circular watch designs the HLQ wins you over with its rivetting good looks contributed by a massive 44 mm wide case boasting a black opaline dial with hand-applied 'HAUTLENCE' lettering, intermediate dial with laser cutting minute figures and a smart hand sewn alligator strap.
Hyperion sired a champion juvenile filly in Opaline at the age of 27, and Mr Prospector got Kentucky Derby victor Fusaichi Pegasus at 26.
Tenders are invited for Enamel, Synthetic, Exterior, Under Coating Opaline Green To Isc,275 Of Is,5/2007 .
The current style has a more modern 36-mm case, a delicate mother-of-pearl dial in subtly graded champagne or opaline white tints, a satin strap or a gold bracelet (either embellished or unadorned), and 12 diamonds (one for each hour), evoking the brand's vision: "a good diamond, however small, is a possession to be prized for generations.
In it, glistening black opaline dials are sprinkled over with diamond brilliants representing planets with luminescent lines linking them to trace the constellations of the twelve zodiac signs.