<ruby> - HTML 5

The <ruby> tag specifies a ruby annotation.
A ruby annotation is a small extra text, attached to the main text to 
indicate the pronunciation or meaning of the corresponding characters. This kind 
of annotation is often used in Japanese publications.
Use the <ruby> tag together with the <rt> and/or the 
<rp> tags: The <ruby> element consists of one or more characters that needs an 
explanation/pronunciation, and an <rt> element that gives that information, and 
an optional <rp> element that defines what to show for browsers that not support ruby annotations.

Syntax

    <ruby>	漢 <rt> ㄏㄢˋ </rt>	</ruby>

Example

    <ruby>	漢 <rt> ㄏㄢˋ </rt>	</ruby>

Output / Return Value

Limitations

Alternatives / See Also

Reference