Topaz definition
A colorless, blue, yellow, brown, or pink orthorhombic mineral valued as a gem. Topaz occurs as transparent or translucent prisms in silica-rich igneous rocks, such as pegmatite, and in tin-bearing rock veins. Chemical formula: Al2SiO4(F,OH)2.
A light yellow variety of quartz.
noun
A colorless, blue, yellow, brown, or pink aluminum silicate mineral, often found in association with granitic rocks and valued as a gemstone, especially in the brown and pink varieties.
noun
Any of various yellow gemstones, especially a yellow variety of sapphire or corundum.
noun
A light-colored or colorless, very hard, orthorhombic mineral, Al2(SiO4)(F,OH)2, often used as a gem; hydrous aluminum silicate.
noun
Advertisement
Any of a various yellowish minerals that resemble yellow topaz, esp. citrine.
noun
Either of two brightly colored hummingbirds (Topaza pyra or T. pella) of South America.
noun
Any of various yellow gemstones, especially a yellow variety of sapphire or corundum.
A clear, yellowish-brown gemstone.
noun
(historical, British India) A black Catholic soldier in the British Army.
noun
Other Word Forms
Noun
Singular:
topaz
Plural:
topazesOrigin of topaz
- Middle English topace from Old French from Latin topazus from Greek topazos
From American Heritage Dictionary of the English Language, 5th Edition
- From the Ancient Greek proper noun Τοπάζιος (Topazios), ancient name of St. John's Island, Egypt, in the Red Sea, believed to be the first discovered source of the mineral τοπάζιον (topazion, “peridot").
From Wiktionary