also: ルビ
noun
Refers to the red gemstone. Usually written ルビー.
彼女の指輪には大きなルビーがはまっている。
Her ring has a large ruby set in it.
noun
ruby character; furigana
Small kana printed above or beside kanji to show the reading. Used especially in publishing and typography; often written ルビ.
この本は難しい漢字にルビが振ってある。
This book has ruby characters attached to difficult kanji.
noun
Only with reading ルビー
The programming language. Always written ルビー.
彼はルビーでウェブアプリケーションを開発している。
He is developing a web application in Ruby.