document.writeln('<dl><dt><b>pre-ignition</b></dt>');
document.writeln('<dd>Pre-ignition is the result of the air/fuel mixture exploding in a');
document.writeln('<a href="/glossary.shtml#cylinder">cylinder</a>, before the');
document.writeln('<a href="/glossary.shtml#sparkplug">spark&nbsp;plug</a> has fired.');
document.writeln('Pre-ignition should not be confused');
document.writeln('with <a href="/glossary.shtml#detonation">detonation</a>, which occurs');
document.writeln('<i>after</i> the <a href="/glossary.shtml#sparkplug">spark&nbsp;plug</a>');
document.writeln('has fired.<br>');
document.writeln('<font size=1><i>by Randy Hicks</i></font></dd></dl>');