Gizzard/ˈɡɪzərd/ Definition 1 of 2Pro Tip 1/3Bird Anatomy Understand 'gizzard' as a specialized part of bird digestion, not found in humans. Birds like turkeys have a gizzard that helps break down seeds. Pro Tip 2/3Dietary Detail Recognize 'gizzard' in discussions about bird diets or culinary uses. Turkey gizzards are often used to make a rich gravy. Pro Tip 3/3Not All Birds Remember that not all birds have a gizzard, commonly found in ground feeders. The sparrow relies on its gizzard to digest seeds.