<http://schema.org/description>
"&lt;p&gt;Backlash is any non-movement that occurs during axis reversals.  Say, for instance, the X axis is commanded to move 1 inch in the positive direction. &lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mmsonline.com/columns/eliminate-backlash-from-machining-centers>