Suppressing output from search results

Is there a way of suppressing output from search results? I have a perch:content 'checkbox' and 'select' where the value or option text is appearing in perch:search id=“result_excerpt”. Both the fields have suppress on them and neither field has a title set. Is there another parameter that stops output appearing in search results, or have I missed something?

Thanks. I didn't even know that attribute existed. A search of the documentation only shows it in perch_content_create options. That's a function I've never needed to use, so never spotted it. BTW it works and solves the problem.