ルビ

るび
noun
ruby text; furigana; reading aid above kanji
1. ruby text; furigana; reading annotations placed above or beside kanji
Small characters placed above (in horizontal text) or beside (in vertical text) kanji to indicate their pronunciation. Named after the typographic term 'ruby' for small-sized type.
漢字(かんじ)にルビを()る。
To add ruby text to kanji.
子供向(こどもむ)けの(ほん)にはルビが()いている。
Children's books have furigana annotations.
(むずか)しい漢字(かんじ)にはルビを()けてもらえると、読者(どくしゃ)にとって親切(しんせつ)だ。
Adding ruby text to difficult kanji is helpful for readers.

From the English typographic term 'ruby,' which refers to a small type size (5.5 points). In Japanese publishing and web design, ルビ refers to the small reading annotations placed alongside kanji characters.

COMMON COLLOCATIONS:

  • ルビを()る: to add ruby/furigana text
  • ルビを()ける: to attach ruby text
  • ルビ()き: with ruby text
  • (そう)ルビ: full ruby (every kanji annotated)

SIMILAR WORDS:

  • ()仮名(がな) (furigana(ふりがな)): furigana — the native Japanese term for the same concept; more commonly used in everyday language
  • ()仮名(がな): reading kana — another term for pronunciation guides

USAGE:
ルビ is the preferred term in publishing, typography, and web development (HTML has a `<ruby>` tag). ()仮名(がな) is more common in educational contexts and everyday conversation. Both refer to the same thing.