balsam

noun

(Gr. balsamon: balm) An aromatic, fragrant, resinous, sticky exudate from any of various tree species, especially those of the genus Commiphora, used in medicine for its soothing and healing properties and in perfumery. Balsam of Peru is derived from the Central American leguminous tree Myroxylon peneirae, grown in El Salvador. The name is also given to many plants of the family Balsaminaceae. The garden balsam (Impatiens balsamina), native to India, is widely cultivated for its showy red flowers, which have a tubular spur and five unequal petals. The balsam apple (Momardica balsamina) is an ornamental vine. Canada balsam is a transparent resin obtained from fir trees. It is used as an adhesive in optical instruments because its refractive index is similar to that of glass.