Ground turmeric is made from the rhizomes of the turmeric plant, after harvest it is boiled, then dried and ground into a powder.
Turmeric, or Cucurma longa, belongs to the ginger root family. The rhizomes can be used fresh, boiled in water and dried. It's used as a coloring and flavoring agent, and has a bitter black pepper-like taste and earthy mustard-like aroma. Fresh Turmeric's gentle carrot/ginger-like flavor lends itself well to both sweet and savory applications.