Fennel seeds are small, oval-shaped seeds derived from the fennel plant, scientifically known . Fennel is a flowering plant in the carrot family, and both its bulb and seeds are used in cooking for their distinct flavor and aroma.Fennel seeds are known for their digestive properties and have been used in traditional for centuries. They are believed to help alleviate digestive issues such as bloating, gas, and indigestion. Chewing fennel seeds after a meal is a common practice in some cultures to aid digestion.