Other forms: balsams
Balsam is a scented sap that many trees produce. The substance that makes a Christmas tree smell incredibly good is balsam.
Balsam is made of a type of sticky oil, specifically known as resin. The word usually connotes the smell of a pine or fir tree; balsam incense and balsam-scented candles have this rich, woodsy odor. But other plants and trees produce balsam as well. The word's Hebrew root is basam, which means "spice or perfume."