ruby

• IPA^(key): [ˈɹuːbi]
• Rhymes: -uːbi

Borrowed from Old French rubi, from Latin rubeus (“red”).

ruby (countable and uncountable, plural rubies)

1. A clear, deep, red variety of corundum, valued as a precious stone.
   • 2012 March 1, Lee A. Groat, “Gemstones”, in American Scientist‎, volume 100, number 2, page 128:

     Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade.

2. (obsolete) A red spinel.
3. A deep red colour.

   ruby colour:  

   • Shakespeare

     the natural ruby of your cheeks

4. (heraldry) The tincture red or gules.
5. (uncountable, printing, Britain, dated) The size of type between pearl and nonpareil, standardized as 5½-point.

   Synonym: agate (US)

6. A ruby hummer, a South American hummingbird, Clytolaema rubricauda.
7. A red bird-of-paradise, Paradisaea rubra.

• corundum
• rouge

ruby (comparative more ruby, superlative most ruby)

1. Of a deep red colour.

ruby (third-person singular simple present rubies, present participle rubying, simple past and past participle rubied)

1. (transitive, poetic) To make red; to redden.

   (Can we find and add a quotation of Alexander Pope to this entry?)

• (reds) red; blood red, brick red, burgundy, cardinal, carmine, carnation, cerise, cherry, cherry red, Chinese red, cinnabar, claret, crimson, damask, fire brick, fire engine red, flame, flamingo, fuchsia, garnet, geranium, gules, hot pink, incarnadine, Indian red, magenta, maroon, misty rose, nacarat, oxblood, pillar-box red, pink, Pompeian red, poppy, raspberry, red violet, rose, rouge, ruby, ruddy, salmon, sanguine, scarlet, shocking pink, stammel, strawberry, Turkey red, Venetian red, vermillion, vinaceous, vinous, violet red, wine ^{(Category: en:Reds)}
• carbuncle
• corundum
• spinel
• Ruby on Wikipedia.Wikipedia

• “Ruby” in David Barthelmy, Webmineral Mineralogy Database, 1997–.
• “ruby”, in Mindat.org‎, Hudson Institute of Mineralogy, accessed 29 August 2016.

From the British 5.5-point font Ruby, used for annotations in printed documents.

ruby (plural rubies)

1. A pronunciation guide written above or beside Chinese or Japanese characters.

   Synonym: rubi

• furigana
• yomigana
• pinyin
• Zhuyin
• Ruby characters on Wikipedia.Wikipedia

• -bury, Bury, bury

ruby

1. Alternative form of robben

• hruby

From Proto-Slavic *grubъ.

ruby

1. fat, thick