Main Entry: ¹ru·by

Pronunciation: \ˈrü-bē\

Function: noun

Inflected Form(s): plural rubies

Etymology: Middle English, from Anglo-French rubi, rubin, from Medieval Latin rubinus, from Latin rubeus reddish; akin to Latin ruber red — more at red

Date: 14th century

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