A loaf of panettone.
panettone definition by Webster's New World
Origin: Italian ; from panetto, diminutive of pane, bread ; from Classical Latin panis: see food
panettone definition by American Heritage Dictionary
noun pl. pan·et·to·nes or pan·et·to·ni
Origin: Italian, augmentative of panetto, a small loaf, diminutive of pane, bread, from Latin pānis; see panada.