plural rubies
Definition of ruby
(Entry 1 of 2)
1a
: a precious stone that is a red corundum
b
: something (such as a watch bearing) made of ruby
2a
: the dark red color of the ruby
b
: something resembling a ruby in color
ruby
adjectiveDefinition of ruby (Entry 2 of 2)
: of the color ruby
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Merriam-Webster unabridged
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Time Traveler for ruby
The first known use of ruby was in the 14th century
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