Borrowed from Medieval Latin olibanum, Late Latin libanus, from Latin oleum libani (“oil of Lebanon”), from Ancient Greek λίβανος (líbanos, “frankincense (Boswellia carterii, now Boswellia sacra)”), from a Semitic source. See the Semitic root lbn لبن, meaning "white". See also (Biblical Hebrew לְבוֹנָה (l'voná, “frankincense”), Arabic لبان (lubān, “frankincense”)). Compare benzoin.
- A gum resin from trees of the genus Boswellia, formerly used as a medicine and now mainly as incense. [from 14th c.]