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opal
1[ oh-puhl ]
noun
- a mineral, an amorphous form of silica, SiO 2 with some water of hydration, found in many varieties and colors, including a form that is milky white.
- an iridescent variety of this that is used as a gem.
- a gem of this.
Opal
2[ oh-puhl ]
noun
- a female given name.
opal
/ ˈəʊpəl /
noun
- an amorphous, usually iridescent, mineral that can be of almost any colour, found in igneous rocks and around hot springs. It is used as a gemstone. Composition: hydrated silica. Formula: SiO 2 . n H 2 O
opal
/ ō′pəl /
- A usually transparent mineral consisting of hydrous silica. Opal can occur in almost any color, but it is often pinkish white with a milky or pearly appearance. It typically forms within cracks in igneous rocks, in limestones, and in mineral veins. It also occurs in the silica-rich shells of certain marine organisms. Chemical formula: SiO 2 ·nH 2 O.
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Derived Forms
- ˈopal-ˌlike, adjective
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Word History and Origins
Origin of opal1
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Word History and Origins
Origin of opal1
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Example Sentences
The rebels then turned their guns on the family huddled in the Opal.
One of the more positive parts of your personal life is your marriage to Opal Stone Perlman, which has lasted over three decades.
That clock has four faces made of opal, estimated at a value of $10-20 million.
In that case, at least, Little, Brown responded by pulling Opal from the bookshelves.
He owned a 54-ton yacht named the Opal, and attributed the wonderful health he enjoyed to his numerous sea voyages.
If the collodion is good, the film is semi-transparent, of a bluish opal-like appearance.
He fell asleep, and soon and slowly and ever so dimly the opal light of the prairie dawn crept shyly over the landscape.
The moon, ringed by a halo, shone like an opal in the milk-white sky.
He was drinking a dose of sal-volatile, and admiring its opal tint.
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