Definition of opal

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Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity..

Lern More About Opal

Cymophanous :: Cymophanous (a.) Having a wavy, floating light; opalescent; chatoyant..
Churchwarden :: Churchwarden (n.) One of the officers (usually two) in an Episcopal church, whose duties vary in different dioceses, but always include the provision of what is necessary for the communion service..
Episcoparian :: Episcoparian (a.) Episcopal.
Hemitrope :: Hemitrope (n.) That which is hemitropal in construction; (Crystallog.) a twin crystal having a hemitropal structure.
Fiorite :: Fiorite (n.) A variety of opal occuring in the cavities of volcanic tufa, in smooth and shining globular and botryoidal masses, having a pearly luster; -- so called from Fiora, in Ischia..
Rhopalia :: Rhopalia (pl. ) of Rhopaliu.
Microscopal :: Microscopal (a.) Pertaining to microscopy, or to the use of the microscope..
Copal :: Copal () A resinous substance flowing spontaneously from trees of Zanzibar, Madagascar, and South America (Trachylobium Hornemannianum, T. verrucosum, and Hymenaea Courbaril), and dug from earth where forests have stood in Africa; -- used chiefly in making varnishes..
Spheno- :: Spheno- () A combining form used in anatomy to indicate connection with, or relation to, the sphenoid bone; as in sphenomaxillary, sphenopalatine..
Nopal :: Nopal (n.) A cactaceous plant (Nopalea cochinellifera), originally Mexican, on which the cochineal insect feeds, and from which it is collected. The name is sometimes given to other species of Cactaceae..
Nasopalatine :: Nasopalatine (a.) Connected with both the nose and the palate; as, the nasopalatine or incisor, canal connecting the mouth and the nasal chamber in some animals; the nasopalatine nerve..
Gloria :: Gloria (n.) A portion of the Mass (Gloria in Excelsis Deo, Glory be to God on high), and also of the communion service in some churches. In the Episcopal Church the version in English is used..
Semiopal :: Semiopal (n.) A variety of opal not possessing opalescence.
Bishoply :: Bishoply (a.) Bishoplike; episcopal.
Orthotropal :: Orthotropal (a.) Alt. of Orthotropou.
Chloropal :: Chloropal (n.) A massive mineral, greenish in color, and opal-like in appearance. It is essentially a hydrous silicate of iron..
Adularia :: Adularia (n.) A transparent or translucent variety of common feldspar, or orthoclase, which often shows pearly opalescent reflections; -- called by lapidaries moonstone..
Gum :: Gum (n.) A vegetable secretion of many trees or plants that hardens when it exudes, but is soluble in water; as, gum arabic; gum tragacanth; the gum of the cherry tree. Also, with less propriety, exudations that are not soluble in water; as, gum copal and gum sandarac, which are really resins..
Episcopally :: Episcopally (adv.) By episcopal authority; in an episcopal manner.
Tersanctus :: Tersanctus (n.) An ancient ascription of praise (containing the word Holy -- in its Latin form, Sanctus -- thrice repeated), used in the Mass of the Roman Catholic Church and before the prayer of consecration in the communion service of the Church of England and the Protestant Episcopal Church. Cf. Trisagion..
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