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ruby

[roo-bee]
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noun, plural ru·bies.
  1. a red variety of corundum, used as a gem.
  2. something made of this stone or one of its imitations, as a bearing in a watch.
  3. a deep-red port wine.
  4. deep red; carmine.
  5. (initial capital letter) Digital Technology. an open-source, high-level programming language that is purely object-oriented.
  6. British Printing. a 5½-point type, nearly corresponding in size to American agate.
adjective
  1. ruby-colored: ruby lips.
  2. containing or set or adorned with a ruby or rubies: a ruby necklace.

Origin of ruby

1275–1325; Middle English rubi (noun) from Old French, from Old Provençal robi(n), from Medieval Latin rubīnus (lapis) “red (stone),” derivative of Latin ruber, rubeus red1
Related formsru·by·like, adjective

Ruby

[roo-bee]
noun
  1. a female given name.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ruby

Contemporary Examples

Historical Examples

  • There was a pen the nibs of which were of ruby, set in gold, made by Doughty.

  • I did all I could to make Ruby's visit a happy one—don't you know I did?

    The Underdog

    F. Hopkinson Smith

  • I ain't hired him to loaf 'round all day with Ruby and to sulk when she's gone.

    The Underdog

    F. Hopkinson Smith

  • I cottoned to ye fust time I see ye, and so did Ruby, and we still do.

    The Underdog

    F. Hopkinson Smith

  • I ain't got nobody but you, Ruby—don't go 'way from me, child—stay with me.'

    The Underdog

    F. Hopkinson Smith


British Dictionary definitions for ruby

ruby

noun plural -bies
  1. a deep red transparent precious variety of corundum: occurs naturally in Myanmar and Sri Lanka but is also synthesized. It is used as a gemstone, in lasers, and for bearings and rollers in watchmaking. Formula: Al 2 O 3
    1. the deep-red colour of a ruby
    2. (as adjective)ruby lips
    1. something resembling, made of, or containing a ruby
    2. (as modifier)ruby necklace
  2. (modifier) denoting a fortieth anniversaryour ruby wedding
  3. (formerly) a size of printer's type approximately equal to 5 1/2 point
Derived Formsruby-like, adjective

Word Origin

C14: from Old French rubi, from Latin rubeus reddish, from ruber red
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

Word Origin and History for ruby

n.

"clear rich-red variety of corundum," c.1300, from Old French rubi (12c.), from Medieval Latin rubinus lapis "red stone" (cf. Italian rubino), from Latin rubeus "red," related to ruber (see red). As a color name from 1570s. As an adjective from late 15c. Modern French rubis is not explained; Klein suggests a plural mistaken for singular.

Online Etymology Dictionary, © 2010 Douglas Harper

ruby in Science

ruby

[rōōbē]
  1. A deep-red, translucent variety of the mineral corundum, containing small amounts of chromium and valued as a gem. Compare sapphire.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.