Marjoram is a cold-sensitive perennial herb or undershrub with sweet pine and citrus flavours. In some Middle Eastern countries, marjoram is synonymous with oregano, and there the names sweet marjoram and knotted marjoram are used to distinguish it from other plants of the genus Origanum.
Marjoram is an herb. People make medicine from the flowers, leaves, and oil. Marjoram is commonly used for runny nose, cough, common cold, other infections, and various digestion problems, but there is no good scientific evidence to support any use. In foods, marjoram herb and oil are used as flavourings