Sorghum. Head of the grain crop (Sorghum sp.), also known as millet or milo. It is the most extensively grown crop in the world and has many uses. It is an important cereal and can be ground into flour for use in baked goods. It has the advantage of being naturally gluten-free, so it can be used in products for people who are gluten intolerant. Sorghum is an important animal food crop and can be processed into ethanol for fuel. In addition, it has been used to manufacture chipboard for walls and biodegradable packaging.