What do you call it when a web site (especially corporate/retail) has a series of rows with thumbnails, each with a little caption/description beneath explaining some benefit or feature of a product or service. Is there a name for this?

I'm building a theme that incorporates this kind of design and I was hoping there is some kind of shorthand for this design feature.

If you don't know what I'm talking about, check out one of the links below.

http://themeforest.net/item/revolution-minimalist-business-html-template/full_screen_preview/2295335

http://themes.two2twelve.com/preview?theme=freshserve