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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for rubier

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 rubier

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

rubier 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.