Poggio is a very common word, primarily found on Tuscan wines. In common parlance it has come to mean hillside, and literally means “hill." But, as is frequently the case, there may very well be more to the story. Appoggiare in Italian means "to support"; many top hillside vineyards in Tuscany are planted on terraced vineyards. Large terraces are called poggione. So, it may very well be that a poggio was a terraced vineyard, and not just any old hill, though that is how it is now commonly used.