Coriander seeds or Dhania seeds are obtained from coriander plant (Coriandrum sativum). Coriander plant, especially leaves, are used widely in many culinary culture commonly known as cilantro (from Spanish name) in the United States. Coriander seeds are used as either whole or ground. The ground coriander powder is also part of spice mixture such as garam masala. Usually coriander seeds are roasted before grounding and whole seeds are roasted or fried before use. The grounded coriander seeds would lose its flavor soon so the best option is to use fresh or store in air tight container.