noun \ˈrü-bē\

: a deep red stone that is used in jewelry

: a dark red color

plural rubies

Full Definition of RUBY

a :  a precious stone that is a red corundum
b :  something (as a watch bearing) made of ruby
a :  the dark red color of the ruby
b :  something resembling a ruby in color

Origin of RUBY

Middle English, from Anglo-French rubi, rubin, from Medieval Latin rubinus, from Latin rubeus reddish; akin to Latin ruber red — more at red
First Known Use: 14th century

Rhymes with RUBY



Definition of RUBY

:  of the color ruby

First Known Use of RUBY



noun    (Concise Encyclopedia)

Gemstone composed of transparent red corundum. Its colour varies from deep to pale red, in some cases with a tinge of purple, depending on chromium and iron content; the most valued is a pigeon-blood red. When it is cut and polished, ruby is a brilliant (light-deflecting) stone, but it lacks fire (flashes of colour). Ruby is a mineral of very limited distribution. Its best-known source is in Myanmar, and rubies have also been found in Thailand, Sri Lanka, and elsewhere. Rubies have been produced synthetically with much success; those containing 2.5% chromic oxide have the prized pigeon-blood red colour.


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