aroma·ther·apy (French/latin/Greek) noun the use of aromatic plant extracts and essential oils for healing and cosmetic purposes. Once inhaled, the scented molecules pass through the olfactory nerves directly to the brain, impacting the amygdala. Otherwise, known as the emotional center of the brain. Thus, making aromatherapy an essential practice for relieving pain, balancing moods, and providing a sense of relaxation.