ruby
Longman Dictionary of Contemporary English 5++LDOCE 5++ru·by /ˈruːbi/ noun (plural rubies) 1. [countable]DCJ a red jewel 红宝石2. (also ruby red) [uncountable]CC a dark red colour 深红色 —ruby adjective
Examples from the Corpus
ruby• How about a ruby and diamond cluster ring that Frank Sinatra gave Lana Turner?• And under the plate, among the spinning wheels, diamonds and rubies do battle against friction.• In pearls and rubies rich the hawthorns show, While through the ice the crimson berries glow.• There weren't any rubies of large size in that period.• When Sophie praised a necklet of rubies that she was wearing, it appeared to give him great pleasure.• All there was around her was endless waves of ruby and ice with the fog crawling beneath her feet.Origin ruby (1300-1400) Old French rubis, rubi, from Latin rubeus “reddish”ru·by nounChineseSyllable
Corpus red a jewel
Ruby
Ruby, Jack

(1911–67) the man who killed Lee Harvey Oswald two days after Oswald was charged with killing President John F. Kennedy. Some people believed that these actions were part of a conspiracy (=secret plan) to kill the President, and that Ruby shot Oswald to prevent him from giving any information about it.
Ruby, Jack

(1911–67) the man who killed Lee Harvey Oswald two days after Oswald was charged with killing President John F. Kennedy. Some people believed that these actions were part of a conspiracy (=secret plan) to kill the President, and that Ruby shot Oswald to prevent him from giving any information about it.
ruby
ru‧by /ˈruːbi/
noun (plural rubies)
2. (also ˌruby ˈred) [uncountable] a dark red colour
—ruby adjective
ru‧by /ˈruːbi/
noun (plural rubies) Date: 1300-1400
Language: Old French
Origin: rubis, rubi, from Latin rubeus 'reddish'
1. [countable] a red jewelLanguage: Old French
Origin: rubis, rubi, from Latin rubeus 'reddish'
2. (also ˌruby ˈred) [uncountable] a dark red colour
—ruby adjective