tourmaline

[ toor-muh-lin, -leen ]

/ ˈtʊər mə lɪn, -ˌlin /

noun

any of a group of silicate minerals of complex composition, containing boron, aluminum, etc., usually black but having various colored, transparent varieties used as gems.

Also tour·ma·lin

[toor-muh-lin], /ˈtʊər mə lɪn/, tur·ma·line

[toor-muh-lin, -leen tur‐] /ˈtʊər mə lɪn, -ˌlin ˈtɜr‐/ .

Origin of tourmaline

1750–60; earlier tourmalin <German Turmalin, ultimately <Sinhalese tōramalliya “carnelian”; see -in²

OTHER WORDS FROM tourmaline

tour·ma·lin·ic

[toor-muh-lin-ik], /ˌtʊər məˈlɪn ɪk/, adjective

Words nearby tourmaline

touristic, touristry, tourist trap, touristy, tour jeté, tourmaline, Tournai, tournament, tournedos, Tourneur, tourney

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for tourmaline

The dichroism of tourmaline is stronger than that of ruby and more obvious to the unaided eye.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public|Frank Bertram Wade
Connecticut green tourmaline tends more to the dark yellowish green, and Ceylon tourmaline to the olive green.
A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public|Frank Bertram Wade
The tourmaline in section is brown, green, blue or colourless, and often the same crystal shows many different tints.
Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5|Various
It is true, others before him had noted that substances like tourmaline possessed electrical properties.
Catholic Churchmen in Science|James J. Walsh

The phenomenon was first observed in crystals of tourmaline, the principal axis of which is a uniterminal triad axis of symmetry.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various

British Dictionary definitions for tourmaline

tourmaline

/ (ˈtʊəməˌliːn) /

noun

any of a group of hard glassy minerals of variable colour consisting of complex borosilicates of aluminium with quantities of lithium, sodium, calcium, potassium, iron, and magnesium in hexagonal crystalline form: used in optical and electrical equipment and in jewellery

Derived forms of tourmaline

tourmalinic (ˌtʊəməˈlɪnɪk), adjective

Word Origin for tourmaline

C18: from German Turmalin, from Sinhalese toramalli carnelian

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for tourmaline

tourmaline

[ tur′mə-lĭn, -lēn′ ]

Any of several minerals having the general chemical formula (Na,Ca)(Mg,Fe,Al,Li)3Al6(BO3)3Si6O18(OH)4. Tourmaline occurs in many different translucent colors, usually in crystals shaped like 3-, 6-, or 9-sided prisms. It occurs in igneous and metamorphic rocks, especially in pegmatites.

单词	tourmaline
释义	tourmaline [ toor-muh-lin, -leen ] / ˈtʊər mə lɪn, -ˌlin / noun any of a group of silicate minerals of complex composition, containing boron, aluminum, etc., usually black but having various colored, transparent varieties used as gems. Also tour·ma·lin [toor-muh-lin], /ˈtʊər mə lɪn/, tur·ma·line [toor-muh-lin, -leen tur‐] /ˈtʊər mə lɪn, -ˌlin ˈtɜr‐/ . Origin of tourmaline 1750–60; earlier tourmalin <German Turmalin, ultimately <Sinhalese tōramalliya “carnelian”; see -in² OTHER WORDS FROM tourmaline tour·ma·lin·ic [toor-muh-lin-ik], /ˌtʊər məˈlɪn ɪk/, adjective Words nearby tourmaline touristic, touristry, tourist trap, touristy, tour jeté, tourmaline, Tournai, tournament, tournedos, Tourneur, tourney Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for tourmaline The dichroism of tourmaline is stronger than that of ruby and more obvious to the unaided eye. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public\|Frank Bertram Wade Connecticut green tourmaline tends more to the dark yellowish green, and Ceylon tourmaline to the olive green. A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public\|Frank Bertram Wade The tourmaline in section is brown, green, blue or colourless, and often the same crystal shows many different tints. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5\|Various It is true, others before him had noted that substances like tourmaline possessed electrical properties. Catholic Churchmen in Science\|James J. Walsh The phenomenon was first observed in crystals of tourmaline, the principal axis of which is a uniterminal triad axis of symmetry. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various British Dictionary definitions for tourmaline tourmaline / (ˈtʊəməˌliːn) / noun any of a group of hard glassy minerals of variable colour consisting of complex borosilicates of aluminium with quantities of lithium, sodium, calcium, potassium, iron, and magnesium in hexagonal crystalline form: used in optical and electrical equipment and in jewellery Derived forms of tourmaline tourmalinic (ˌtʊəməˈlɪnɪk), adjective Word Origin for tourmaline C18: from German Turmalin, from Sinhalese toramalli carnelian Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for tourmaline tourmaline [ tur′mə-lĭn, -lēn′ ] Any of several minerals having the general chemical formula (Na,Ca)(Mg,Fe,Al,Li)3Al6(BO3)3Si6O18(OH)4. Tourmaline occurs in many different translucent colors, usually in crystals shaped like 3-, 6-, or 9-sided prisms. It occurs in igneous and metamorphic rocks, especially in pegmatites. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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