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

Primus :: Primus (n.) One of the bishops of the Episcopal Church of Scotland, who presides at the meetings of the bishops, and has certain privileges but no metropolitan authority..
Harvest-home :: Harvest-home (n.) A service of thanksgiving, at harvest time, in the Church of England and in the Protestant Episcopal Church in the United States..
Orthotropal :: Orthotropal (a.) Alt. of Orthotropou.
Rhopalia :: Rhopalia (pl. ) of Rhopaliu.
Chorepiscopal :: Chorepiscopal (a.) Pertaining to a chorepiscopus or his change or authority.
Ropalic :: Ropalic (a.) See Rhopalic.
Unbishop :: Unbishop (v. t.) To deprive, as a city, of a bishop; to deprive, as a clergyman, of episcopal dignity or rights..
Pterygopalatine :: Pterygopalatine (a.) Of or pertaining to the pterygoid processes and the palatine bones.
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..
Nopalry :: Nopalry (n.) A plantation of the nopal for raising the cochineal insect.
Hydrophane :: Hydrophane (n.) A semitranslucent variety of opal that becomes translucent or transparent on immersion in water.
Geyserite :: Geyserite (n.) A loose hydrated form of silica, a variety of opal, deposited in concretionary cauliflowerlike masses, around some hot springs and geysers..
Moonstone :: Moonstone (n.) A nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. It is used as a gem. The best specimens come from Ceylon..
Archiepiscopal :: Archiepiscopal (a.) Of or pertaining to an archbishop; as, Canterbury is an archiepiscopal see..
Opalescing :: Opalescing (p. pr. & vb. n.) of Opalesc.
Cat''s-eye :: Cat's-eye (n.) A variety of quartz or chalcedony, exhibiting opalescent reflections from within, like the eye of a cat. The name is given to other gems affording like effects, esp. the chrysoberyl..
Episcopalian :: Episcopalian (a.) Pertaining to bishops, or government by bishops; episcopal; specifically, of or relating to the Protestant Episcopal Church..
Opalescence :: Opalescence (n.) A reflection of a milky or pearly light from the interior of a mineral, as in the moonstone; the state or quality of being opalescent..
Nopalries :: Nopalries (pl. ) of Nopalr.
Archi- :: Archi- () A prefix signifying chief, arch; as, architect, archiepiscopal. In Biol. and Anat. it usually means primitive, original, ancestral; as, archipterygium, the primitive fin or wing..
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