Stylized implementation of HTML's <abbr> element for abbreviations and acronyms to show the expanded version on hover. Abbreviations with a title attribute have a light dotted bottom border and a help cursor on hover, providing additional context on hover.
For expanded text on long hover of an abbreviation, include the title attribute.
An abbreviation of the word attribute is attr.
<p>An abbreviation of the word attribute is <abbr title="attribute">attr</abbr>.</p>