- any of several resinous substances, used in incenses, ointments, etc.
- any tree, as of the genera Bursera and Populus, yielding such a product.
- balsam poplar.
- any of several strong-smelling resinous gums obtained from certain trees, used in making ointments, incense, etc
- any tree yielding this resin, esp the balsam poplar