Is there a difference between partly sunny and partly cloudy?

This morning the meteorologist said to expect partly sunny weather today and this got me to thinking. Is there a difference between partly sunny and partly cloudy? Does partly sunny mean that there will be more sunshine then clouds, I am not sure.

Looking at the sky, there seems to be more clouds then sun. I would say the weather is mostly cloudy, but earlier today it was mostly sunny. I would like to know what meteorologist mean when they use terms such as “partly sunny” and “partly cloudy”.