also: ルビ
Her ring has a large ruby set in it.
ruby character; furigana
Small kana printed above or beside kanji to show the reading. Used especially in publishing and typography; often written ルビ.
This book has ruby characters attached to difficult kanji.
Only with reading ルビー
The programming language. Always written ルビー.
He is developing a web application in Ruby.
She received a ruby ring.
I added furigana to the difficult kanji.
counter for small objects; counter for pieces · counter for military units · individual; one person · counter for years of age difference; counter for school years
ruby wedding anniversary; 40th wedding anniversary
Standard katakana spelling for the gemstone and the programming language.
Common spelling for ruby characters (furigana) in printing and typography.
Borrowed from English 'ruby'. The gemstone sense is the original; the typographic sense derives from the name of a small type size used for annotations, and the programming language was named after the gemstone.